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Gerrymandering

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Gerrymandering



 
 
Gerrymandering is a form of redistribution
Redistribution (election)

Redistribution , called redistricting in the United States, is the process of changing of political borders. This often means changing electoral district boundaries, usually in response to periodic census results....
 in which electoral district
Electoral district

An electoral district is a distinct region for holding a separate election for one or more seats in a legislative body. Not all political systems use separate districts to conduct elections; Politics of Israel and Politics of the Netherlands, for instance, conduct parliamentary elections using a single, nationwide district....
 or constituency
Constituency

A constituency is any cohesive body of people bound by shared identity, goals, or loyalty. Constituency can be used to describe a business's customer base and shareholders, or a charity's donors or those it serves....
 boundaries are deliberately modified for electoral advantage. Gerrymandering may be used to help or hinder particular constituents
Constituent (politics)

In politics, the term constituent has three separate meanings:*A constituent state or constituent nation is a fundamental part of a union which has come together with others to form the union, e.g....
, such as members of a political, racial, linguistic, religious or class group.

The term gerrymandering is derived from Elbridge Gerry
Elbridge Gerry

Elbridge Thomas Gerry was an United States statesman and diplomat. As a Democratic-Republican he was selected as the fifth Vice President of the United States of America, serving under James Madison, from March 4, 1813 until his death a year and a half later....
 (1744–1814), the governor of Massachusetts from 1810 to 1812. The term first appeared in the Boston Gazette
Boston Gazette

The Boston Gazette was an early newspaper printed in the British North American colonies; it began publication December 12, 1719 and appeared weekly....
 on March 26, 1812 (see image).






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Encyclopedia


Gerrymandering is a form of redistribution
Redistribution (election)

Redistribution , called redistricting in the United States, is the process of changing of political borders. This often means changing electoral district boundaries, usually in response to periodic census results....
 in which electoral district
Electoral district

An electoral district is a distinct region for holding a separate election for one or more seats in a legislative body. Not all political systems use separate districts to conduct elections; Politics of Israel and Politics of the Netherlands, for instance, conduct parliamentary elections using a single, nationwide district....
 or constituency
Constituency

A constituency is any cohesive body of people bound by shared identity, goals, or loyalty. Constituency can be used to describe a business's customer base and shareholders, or a charity's donors or those it serves....
 boundaries are deliberately modified for electoral advantage. Gerrymandering may be used to help or hinder particular constituents
Constituent (politics)

In politics, the term constituent has three separate meanings:*A constituent state or constituent nation is a fundamental part of a union which has come together with others to form the union, e.g....
, such as members of a political, racial, linguistic, religious or class group.

The term gerrymandering is derived from Elbridge Gerry
Elbridge Gerry

Elbridge Thomas Gerry was an United States statesman and diplomat. As a Democratic-Republican he was selected as the fifth Vice President of the United States of America, serving under James Madison, from March 4, 1813 until his death a year and a half later....
 (1744–1814), the governor of Massachusetts from 1810 to 1812. The term first appeared in the Boston Gazette
Boston Gazette

The Boston Gazette was an early newspaper printed in the British North American colonies; it began publication December 12, 1719 and appeared weekly....
 on March 26, 1812 (see image). In 1812, Governor Gerry signed a bill into law that redistricted his state to benefit his Democratic-Republican party.

Voting systems

legislature to favor the incumbent Democratic-Republican party candidates of Governor Elbridge Gerry over the Federalists, from which the term gerrymander is derived. The cartoon depicts the bizarre shape of a district in Essex County, Massachusetts
Essex County, Massachusetts

Essex County is a county located in the northeastern part of the U.S. state of Massachusetts. As of 2000, the population was 723,419. It has two county seats: Salem, Massachusetts and Lawrence, Massachusetts....
 as a dragon
Dragon

File:Ukiyo-e dragon 2.jpgThe dragon is a legendary creature with serpentine shape or otherwise reptilian traits that features in the mythology of many cultures....
. The painter, Gilbert Stuart, likened it to a salamander, and the editor, Benjamin Russel, advised "Better say a Gerrymander." The name stuck.]] Gerrymandering is used most often in favor of ruling incumbent
Incumbent

The incumbent, in politics, is the holder of a political office. This term is usually used in reference to elections, in which races can often be defined as being between an incumbent and non-incumbent....
s or a specific political party
Political party

A political party is a political organization that seeks to attain and maintain politics power within government, usually by participating in electoral campaigns....
. Societies whose legislatures use a single-winner voting system
Voting system

A voting system allows voters to choose between options, often in an election where candidates are selected for public administration. Voting can be also used to award prizes, to select between different plans of action, or by a computer program to find a solution to a problem....
 are the most likely to have political parties that gerrymander for advantage. Most notably, gerrymandering is particularly effective in non-proportional systems
Voting system

A voting system allows voters to choose between options, often in an election where candidates are selected for public administration. Voting can be also used to award prizes, to select between different plans of action, or by a computer program to find a solution to a problem....
 that tend towards fewer parties, such as first past the post.

Most democracies have partly proportional electoral systems, where several political parties are proportionally represented in the national parliaments, in proportion to the total numbers of votes of the parties in the regional or national elections. In these more or less proportional representation
Proportional representation

Proportional representation , sometimes referred to as full representation, is a category of voting systems aimed at a close match between the percentage of votes that groups of candidates obtain in elections and the percentage of seats they receive ....
 systems, gerrymandering has little or less significance.

Some countries, such as the UK
United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom , the UK or Britain,is a sovereign state located off the northwestern coast of continental Europe....
 and Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
, authorize non-partisan organizations to set constituency boundaries to prevent gerrymandering. Gerrymandering is most common in countries where elected politicians are responsible for defining constituency boundaries. They have obvious self interest in determining boundaries to their and their party's interest. The United States of America is an example of such a system.

Gerrymandering should not be confused with malapportionment
Apportionment (politics)

Apportionment is the process of allocating political power among a set of principles . In most representative governments, political power has most recently been apportioned among constituencies based on population, but there is a long history of different approaches....
, whereby the number of eligible voters per elected representative can vary widely. Nevertheless the ~mander suffix has been applied to particular malapportionments, such as the "Playmander
Playmander

The Playmander was a form of electoral Apportionment in the Australian state of South Australia, in place from 1936 to 1968. It consisted of rural districts enjoying a 2-to-1 advantage in the Parliament of South Australia, even though they contained less than half of the population, as well as a change from multiple member to single member e...
" in South Australia
South Australia

South Australia is a States and territories of Australia of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories....
 and the "Bjelkemander
Bjelkemander

The Bjelkemander was the term given to a system of malapportionment in the Australian State of Queensland in the 1970s and 1980s. Under the system, electorates were allocated to zones such as rural or metropolitan and electoral boundaries drawn so that rural electorates had about half as many voters as metropolitan ones....
" in Queensland
Queensland

Queensland is a States and territories of Australia of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory to the west, South Australia to the south-west and New South Wales to the south....
. Sometimes political representatives use both gerrymandering and malapportionment to try to maintain power.


Packing and cracking

The two aims of gerrymandering are to maximize the effect of supporters’ votes and to minimize the effect of opponents' votes. One strategy, packing, is to concentrate as many voters of one type into a single electoral district to reduce their influence in other districts. In some cases this may be done to obtain representation for a community of common interest, as in the coastal district shown at left, rather than to dilute that interest over several districts to a point of ineffectiveness. A second strategy, cracking, involves spreading out voters of a particular type among many districts in order to deny them a sufficiently large voting block in any particular district. The strategies are typically combined, creating a few "forfeit" seats for packed voters of one type in order to secure even greater representation for voters of another type.

Gerrymandering is effective because of the wasted vote effect. By packing opposition voters into districts they will already win (increasing excess votes for winners) and by cracking the remainder among districts where they are moved into the minority (increasing votes for eventual losers), the number of wasted votes among the opposition can be maximized. Similarly, with supporters holding narrow margins in the unpacked districts, the number of wasted votes among supporters is minimized.

Effects of gerrymandering


Reduction in electoral competition and voter turnout

The most immediate and obvious effect of gerrymandering is that elections become less competitive in all districts, particularly packed ones. As electoral margins of victory become significantly greater and politicians have safe seat
Safe seat

A safe seat is a seat in a legislature which is regarded as fully secured, either by a certain political party, the incumbent representative personally or a combination of both....
s, the incentive for meaningful campaigning is reduced.

As the chance of influencing electoral results by voting is reduced, voter turnout
Voter turnout

Voter turnout is the percentage of eligible voting who cast a ballot in an election. After increasing for many decades, there has been a trend of decreasing voter turnout in most established democracy since the 1960s....
 is likely to decrease. Correspondingly, political campaigns are less likely to expend resources to encourage turnout. With a reduction in competition, a candidate puts more effort into securing party nomination
Nomination

Nomination is part of the process of selecting a candidate for either election to an office, or the bestowing of an honor or award.In the context of elections for public office, a candidate who has been selected by a political party is normally said to be the nominee of that party....
 for a given district rather than gaining approval of the general electorate. In a gerrymandered district, the candidate is virtually assured of a win once nominated. In 2004, for example, when California's 3rd Congressional District
Congressional district

A congressional Electoral district is an electoral constituency that elects a single member of a congress. Countries with congressional districts include the United States, the Philippines, and Japan....
 became an open seat after Republican Congressman Doug Ose
Doug Ose

Douglas Arlo "Doug" Ose is a California congressman who served in the U.S. House of Representatives from 1999 to 2005, representing California's 3rd Congressional District....
 ran for higher office, the state's three strongest Republican congressional candidates campaigned vigorously against one another for nomination in the district's primary election
Primary election

A primary election , also referred to simply as a primary, is an election in which voters in a jurisdiction select candidates for a subsequent election....
. Several other districts were uncontested with no Republican nominees making even a token campaign effort.

Increased incumbent advantage and campaign costs

The effect of gerrymandering for incumbents is particularly advantageous, as incumbents are far more likely to be reelected under conditions of gerrymandering. For example, in 2002, according to political scientists Norman Ornstein and Thomas Mann
Thomas E. Mann

Thomas E. Mann is a political scientist, author, and Pundit who works at the Brookings Institution. He primarily studies and speaks on elections in the United States, especially campaign finance reform....
, only four challengers were able to defeat incumbent members of the US Congress, the lowest number in modern American history. Incumbents are likely to be of the majority party orchestrating a gerrymander, and incumbents are usually easily renominated in subsequent elections, including incumbents among the minority.

This demonstrates that gerrymandering can have a deleterious effect on the principle of democratic accountability. With uncompetitive seats/districts reducing the fear that incumbent politicians may lose office, they have less incentive to represent the interests of their constituents, even when those interests conform to majority support for an issue across the electorate as a whole. Incumbent politicians may look out more for their party's interests than for those of their constituents.

Gerrymandering can have an impact on campaign costs for district elections. If districts become increasingly stretched out, candidates must pay increased costs for transportation and trying to develop and present campaign advertising
Campaign advertising

In politics, campaign advertising is the use of paid media to influence the decisions made for and by groups. These ads are designed by political consulting and the political campaign staff....
 across a district. The incumbent's advantage in securing campaign funds is another benefit of his or her having a gerrymandered secure seat.

Less descriptive representation

Gerrymandering also has significant effects on the representation
Representation (politics)

In politics, representation describes how political power is alienated from most of the members of a group and vested, for a certain time period, in the hands of a small subset of the members....
 received by voters in gerrymandered districts. Because gerrymandering is designed to increase the number of wasted votes among the electorate, the relative representation of particular groups can be drastically altered from their actual share of the voting population. This effect can significantly prevent a gerrymandered system from achieving proportional
Proportional representation

Proportional representation , sometimes referred to as full representation, is a category of voting systems aimed at a close match between the percentage of votes that groups of candidates obtain in elections and the percentage of seats they receive ....
 and descriptive representation, as the winners of elections are increasingly determined by who is drawing the districts rather than the preferences of the voters.

Gerrymandering may be advocated to improve representation within the legislature among otherwise underrepresented minority groups by packing them into a single district. This can be controversial, as it may lead to those groups' remaining marginalized in the government as they become confined to a single district. Candidates outside that district no longer need to represent them to win election.

As an example, much of the redistricting conducted in the United States in the early 1990s involved the intentional creation of additional "majority-minority" districts where racial minorities such as African Americans were packed into the majority. This "maximization policy" drew support by both the Republican Party (who had limited support among African Americans and could concentrate their power elsewhere) and by minority representatives elected as Democrats
Democratic Party (United States)

The Democratic Party is one of two major party contemporary political parties in the United States, along with the Republican Party . It is the oldest political party in continuous operation in the United States and it is one of the oldest parties in the world....
 from these constituencies, who then had safe seat
Safe seat

A safe seat is a seat in a legislature which is regarded as fully secured, either by a certain political party, the incumbent representative personally or a combination of both....
s.

Incumbent gerrymandering

Gerrymandering can also be done to help incumbent
Incumbent

The incumbent, in politics, is the holder of a political office. This term is usually used in reference to elections, in which races can often be defined as being between an incumbent and non-incumbent....
s as a whole, effectively turning every district into a packed one and greatly reducing the potential for competitive elections. This is particularly likely to occur when the minority party has significant obstruction power — unable to enact a partisan gerrymander, the legislature instead agrees on ensuring their own mutual reelection.

In an unusual occurrence in 2000, for example, the two dominant parties in the state of California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
 cooperatively redrew
Politics of California

The recent and current politics of the U.S. state of California are complex and involve a number of entrenched interests. .''...
 both state and Federal legislative districts to preserve the status quo, ensuring the electoral safety of the politicians from unpredictable voting by the electorate. This move proved completely effective, as no State or Federal legislative office changed party in the 2004 election, although 53 congressional, 20 state senate, and 80 state assembly seats were potentially at risk.

In 2006, the term "70/30 District" came to signify the equitable split of two evenly split (i.e. 50/50) districts. The resulting districts gave each party a guaranteed seat and retained their respective power base.

Changes to achieve competitive elections

Due to many issues associated with gerrymandering and its impact on competitive elections and democratic accountability, numerous countries have enacted reforms making the practice either more difficult or less effective. Countries such as the UK, Australia, Canada and most of those in Europe have transferred responsibility for defining constituency boundaries to neutral or cross-party bodies.

In the United States, however, such reforms are controversial and frequently meet particularly strong opposition from groups that benefit from gerrymandering. In a more neutral system, they might lose considerable influence.

Redistricting by neutral or cross-party agency

The most commonly advocated electoral reform proposal targeted at gerrymandering is to change the redistricting process. Under these proposals, an independent and presumably objective commission is created specifically for redistricting, rather than having the legislature do it. This is the system used in the United Kingdom
United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom , the UK or Britain,is a sovereign state located off the northwestern coast of continental Europe....
, where the independent Boundary Commission
Boundary Commission (United Kingdom)

Boundary Commissions in the UK are non-departmental public bodies responsible for determining the Border of constituency for elections to the UK Parliament, the Scottish Parliament and the National Assembly for Wales....
 determines the boundaries for constituencies
United Kingdom constituencies

In the United Kingdom , each of the electoral areas or divisions called constituencies elects one or more members to a parliament or assembly....
 in the House of Commons
British House of Commons

The House of Commons is the lower house of the Parliament of the United Kingdom, which also comprises the British monarchy and the House of Lords ....
 and regional legislatures, subject to ratification by the body in question (almost always granted without debate).

To help ensure neutrality, members of a redistricting agency may be appointed from relatively apolitical sources such as retired judges or longstanding members of the civil service
Civil service

The term civil service has two distinct meanings:* Branch of governmental service in which individuals are hired on the basis of merit which is proven by the use of competitive examinations....
, possibly with requirements for adequate representation among competing political parties. Additionally, members of the board can be denied access to information that might aid in gerrymandering, such as the demographic makeup or voting patterns of the population. As a further constraint, consensus
Consensus

Consensus has two common meanings. One is a general Wiktionary:agreement among the members of a given group or community, each of which exercises some discretion in decision making and follow-up action....
 requirements can be imposed to ensure that the resulting district map reflects a wider perception of fairness, such as a requirement for a supermajority
Supermajority

A supermajority or a qualified majority is a requirement for a proposal to gain a specified level or type of support which exceeds a majority in order to have effect....
 approval of the commission for any district proposal. Consensus requirements, however, can lead to deadlock, such as occurred in Missouri
Missouri

Missouri is a U.S. state in the Midwestern United States of the United States bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska....
 following the 2000 census. There, the equally numbered partisan appointees were unable to reach consensus in a reasonable time, and consequently the courts had to determine district lines.

In the US state of Iowa
Iowa

The State of Iowa is a U.S. state in the Midwestern region of the United States of America, an area often referred to as the "American Heartland." It is bordered by Minnesota to the north, Wisconsin and Illinois to the east, Nebraska and South Dakota to the west, and Missouri to the south....
, the nonpartisan Legislative Services Bureau (LSB) (akin to the US Congressional Research Service
Congressional Research Service

The Congressional Research Service is the public policy research arm of the United States Congress. As a legislative branch agency within the Library of Congress, CRS works exclusively and directly for Members of Congress, their Committees and staff on a confidential, nonpartisan basis....
) determines boundaries of electoral districts. Aside from satisfying federally mandated contiguity and population equality criteria, the LSB mandates unity of counties and cities. Consideration of political factors such as location of incumbents, previous boundary locations, and political party proportions is specifically forbidden. Since Iowa's counties are chiefly regularly shaped polygons, the LSB process has led to districts that follow county lines.

In 2005, the US state of Ohio
Ohio

Ohio is a Midwestern United States U.S. state of the United States. As part of the Great Lakes region , Ohio has long been a cultural and geographical crossroads in North America....
 had a ballot measure to create an independent commission whose first priority was competitive districts, a sort of "reverse gerrymander". A complex mathematical formula was to be used to determine the competitiveness of a district. The measure failed voter approval chiefly due to voter concerns that communities of interest would be broken up.

Changing the voting system

Because gerrymandering relies on the wasted vote effect, the use of a different voting system
Voting system

A voting system allows voters to choose between options, often in an election where candidates are selected for public administration. Voting can be also used to award prizes, to select between different plans of action, or by a computer program to find a solution to a problem....
 with fewer wasted votes can help reduce gerrymandering. In particular, the use of multimember districts alongside voting systems establishing proportional representation
Proportional representation

Proportional representation , sometimes referred to as full representation, is a category of voting systems aimed at a close match between the percentage of votes that groups of candidates obtain in elections and the percentage of seats they receive ....
 such as single non-transferable vote
Single non-transferable vote

The single non-transferable vote or SNTV is an electoral system used in multi-member constituency elections....
 or cumulative voting
Cumulative voting

Cumulative voting is a multiple-winner voting system intended to promote proportional representation while also being simple to understand....
 can greatly reduce the proportion of wasted votes, and therefore the potential for gerrymandering. Due to their relative simplicity and similarity to first past the post electoral reformers often advocate them as replacement systems.

Electoral systems with different forms of proportional representation are now found in nearly all European countries. In this way, they have multi-party systems (with many parties represented in the parliaments) with higher voter attendance in the elections, fewer wasted votes, and a wider variety of political opinions represented.

Electoral systems with election of just one candidate in each district, and no proportional distribution of extra mandates to smaller parties, tend to create two-party systems (Duverger's Law
Duverger's law

In political science, Duverger's law is a law which asserts that a Plurality voting system election system tends to favor a two-party system....
). In these, just two parties effectively compete in the national elections and thus the national political discussions are forced into a narrow two-party frame, where loyalty and forced statements inside the two parties distort the political debate.

Changing the size of districts and the elected body

If a proportional or semi-proportional voting system alongside multimember districts is used, then increasing the number of winners in any given district will reduce the number of wasted votes. This can be accomplished both by merging separate districts together and by increasing the total size of the body to be elected. Since gerrymandering relies on exploiting the wasted vote effect to secure electoral advantage, reducing the number of wasted votes by increasing the number of winners in a district can greatly reduce the potential for gerrymandering. Unless all districts are merged, however, this method cannot eliminate gerrymandering entirely.

In contrast to proportional methods, if a nonproportional voting system with multiple winners (such as block voting
Plurality-at-large voting

Plurality-at-large voting, commonly referred to as block voting or bloc voting, is a voting system for electing several representatives from a single multimember electoral district using a series of check boxes and tallying votes similar to a plurality voting system....
) is used, then increasing the size of the elected body while keeping the number of districts constant will not reduce the amount of wasted votes, leaving the potential for gerrymandering the same. While merging districts together under such a system can reduce the potential for gerrymandering, doing so also amplifies the tendency of block voting to produce landslide victories
Landslide victory

In politics, a landslide victory is the victory of a candidate or political party by an overwhelming margin in an election....
, creating a similar effect to gerrymandering by concentrating wasted votes among the opposition and denying them representation.

If a system of single-winner elections is used, then increasing the size of the elected body will implicitly increase the number of districts to be created. This change can actually make gerrymandering easier when raising the number of single-winner elections, as opposition groups can be more efficiently packed into smaller districts without accidentally including supporters, further increasing the number of wasted votes amongst the opposition.

Using fixed districts

Another way to avoid gerrymandering is simply to stop redistricting altogether and use existing political boundaries such as state, county, or provincial lines. While this prevents future gerrymandering, any existing advantage may become deeply ingrained. The United States Senate
United States Senate

The United States Senate is the upper house of the Bicameralism United States Congress, the lower house being the United States House of Representatives....
, for instance, has more competitive elections than the House of Representatives due to the use of existing state borders rather than gerrymandered districts — Senators are elected by their entire state, while Representatives are elected in legislatively-drawn districts.

The use of fixed districts creates an additional problem, however, in that fixed districts do not take into account changes in population. Individual voters can come to have very different degrees of influence on the legislative process. This malapportionment can greatly affect representation after long periods of time or large population movements. In the United Kingdom during the industrial revolution
Industrial Revolution

The Industrial Revolution was a period in the late 18th and early 19th centuries when major changes in agriculture, manufacturing, production, and transportation had a profound effect on the socioeconomics and cultural conditions in United Kingdom....
, several constituencies which had been fixed since they gained representation in the Parliament of England became so small that they could be won with only a handful of voters (rotten borough
Rotten borough

The term "rotten" or "decayed" borough referred to a parliamentary borough or constituency in the United Kingdom of Great Britain and Ireland which had a very small population and was used by a patron to exercise undue and unrepresentative influence within parliament....
s
). Similarly, in the US the state legislature of Alabama refused to redistrict for more than 60 years, despite major changes in population patterns. By 1960 less than a quarter of the state's population controlled the majority of seats in the legislature. However, this practice of using fixed districts for state legislatures was effectively banned in the United States after the Baker v. Carr
Baker v. Carr

Baker v. Carr, Case citation , was a landmark case United States Supreme Court case that retreated from the Court's political question doctrine, deciding that reapportionment issues present justiciability questions, thus enabling federal courts to intervene in and to decide reapportionment cases....
 Supreme Court decision, establishing a rule of one man, one vote.

Objective rules to create districts

Another means to reduce gerrymandering is to create objective, precise criteria to which any district map must comply. Courts in the United States, for instance, have ruled that congressional districts must be contiguous in order to be constitutional. This, however, is not a particularly binding constraint, as very narrow strips of land with few or no voters in them may be used to connect separate regions for inclusion in one district. Another objective criterion is maximized compactness
Compactness measure of a shape

The compactness measure of a shape, sometimes called the shape factor, is a numerical quantity representing the degree to which a shape is compact....
, subject to other constraints such as geographic features and boundaries of local governments.

One idea is to define within the constitution a specific minimum isoperimetric quotient, or minimum ratio, between the area and perimeter of any given congressional voting district. Computer algorithms could ensure that population districts were drawn in such a way so as to minimize isoperimetric inequality and effectively eliminate gerrymandering. Although technologies presently exist to define districts in this manner, there are no rules in place mandating their use, and no national movement to implement such a policy. Such rules would prevent incorporation of jagged natural boundaries, such as rivers or mountains. When such boundaries are required (such as at the edge of a state), certain districts may not be able to meet the required minima.

Another method is to define a minimum district to convex polygon
Convex polygon

In geometry, a polygon can be either convex or concave....
 ratio
. To use this method, every proposed district is circumscribed by the smallest possible convex polygon (similar to the concept of a convex hull
Convex hull

In mathematics, the convex hull or convex envelope for a Set of points X in a real vector space V is the minimal convex set containing X....
). Then, the area of the district is divided by the area of the polygon; or, if at the edge of the state, by the portion of the area of the polygon within state boundaries. The advantages of this method are that it allows a certain amount of human intervention to take place (thus solving the Colorado problem of splitline districting); it allows the borders of the district to follow existing jagged subdivisions, such as neighborhoods or voting districts (something isoperimetric rules would discourage); and it allows concave coastline districts, such as the Florida gulf coast area. It would mostly eliminate bent districts, but still permit long, straight ones. However, since human intervention is still allowed, the gerrymandering issues of packing and cracking would still occur, just to a lesser extent.

Shortest splitline algorithm
The Center for Range Voting
Center for Range Voting

The Center for Range Voting was founded in 2005 by Warren D. Smith and Jan Kok. It operates a web site and a mailing list. The Center is notable as a source for information about Range voting, simulations and analysis of Voting systems, and arguments about Instant-runoff voting....
 has proposed a way to draw districts by a simple algorithm
Algorithm

In mathematics, computing, linguistics and related subjects, an algorithm is a sequence of finite instructions, often used for calculation and data processing....
. Because the algorithm uses only the shape of the state, the number N of districts wanted, and the population distribution as inputs — and does not know the party loyalties of those people — the result cannot be biased. The algorithm (slightly simplified) is:
  1. Start with the boundary outline of the state.
  2. Let N=A+B where A and B are as nearly equal whole numbers as possible. (For example, 7=4+3.)
  3. Among all possible dividing lines that split the state into two parts with population ratio A:B, choose the shortest.
  4. We now have two hemi-states, each to contain a specified number (namely A and B) of districts. Handle them recursively via the same splitting procedure.
This district-drawing algorithm has the advantage of simplicity, ultra-low cost, clear unbiasedness, and it produces simple boundaries that do not meander needlessly. It has the disadvantage of ignoring geographic features such as rivers, cliffs, and highways and cultural features such as tribal boundaries. This landscape oversight causes it to produce districts differently than those an unbiased human would produce. Not ignoring geographic features can induce very complicated boundaries.

Also, splitline districts sometimes do not work well when one of the first few splitlines cuts through a large metropolitan area. This is most evident in the splitline allocation of Colorado
Colorado

The State of Colorado is a U.S. state located in the Mountain States of the United States of America. Colorado may also be considered to be a part of the Western United States and Southwestern United States regions of the United States....
.

As of July 2007, shortest-splitline redistricting pictures are now available for all 50 states.

Use of databases and computer technology

The introduction of modern computer
Computer

A computer is a machine that manipulates Data according to a list of Code .The first devices that resemble modern computers date to the mid-20th century , although the computer concept and various machines similar to computers existed earlier....
s alongside the development of elaborate voter database
Voter database

A voter database is a database containing information on voters for the purpose of assisting a political party or an individual politician, in their Get out the vote efforts and other areas of the campaign....
s and special districting software has made gerrymandering a far more precise science. Using such databases, political parties can obtain detailed information about every household including political party registration, previous campaign donations, and the number of times residents voted in previous elections and combine it with other predictors of voting behavior such as age, income, race, or education level. With this data, gerrymandering politicians can predict the voting behavior of each potential district with an astonishing degree of precision, leaving little chance for creating an accidentally competitive district.

National examples of gerrymandering

Among western democracies, Israel and the Netherlands employ electoral systems with only one (nationwide) voting district for election of national representatives. This precludes gerrymandering.

Canada

Early in Canadian
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
 history, both the federal and provincial levels used gerrymandering to try to maximize partisan power. When Alberta
Alberta

Alberta is one of Canada Canadian Prairies Provinces and territories of Canada. It became a province on September 1, 1905.Alberta is located in western Canada, bounded by the provinces of British Columbia to the west and Saskatchewan to the east, the Northwest Territories to the north, and the U.S....
 and Saskatchewan
Saskatchewan

Saskatchewan is a prairie provinces in Canada, which has an area of 588,276.09 square kilometres and a population of 1,015,895 , mostly living in the southern half of the province....
 were admitted to Confederation in 1905, their original district boundaries were set forth in the respective Alberta
Alberta Act

The Alberta Act, effective September 1, 1905, was the Act of Parliament of the Parliament of Canada that created the province of Alberta. The act is similar in nature to The Saskatchewan Act, which established the province of Saskatchewan at the same time....
 and Saskatchewan Acts. These boundaries had been devised by federal Liberal
Liberal Party of Canada

The Liberal Party of Canada , colloquially known as the Grits, is a major political party in Canada. The party is positioned in the centre-left of the Politics of Canada....
 cabinet members to ensure the election of provincial Liberal governments.

Since responsibility for drawing electoral boundaries was handed over to independent agencies, this problem has essentially been eliminated. Manitoba was the first province to authorize a non-partisan group to define constituency boundaries in the 1950s. In 1964, the federal government delegated the drawing of boundaries for national seats to the "arm's length" Elections Canada
Elections Canada

Elections Canada is an independent, non-partisan agency reporting directly to the Parliament of Canada. Its ongoing responsibility is to ensure that Canadians can exercise their choices in elections in Canada and referendum through an open and impartial process....
. As a result, gerrymandering is not generally a major issue in Canada.

In 2006, a controversy arose on Prince Edward Island
Prince Edward Island

Prince Edward Island is a Canada Provinces and territories of Canada consisting of an island of the same name. The Maritimes is the smallest in the nation in both land area and population ....
 over the provincial government's decision to throw out an electoral map drawn by an independent commission. Instead they created two new maps. The government adopted the second of these, designed by the caucus
Caucus

A caucus is a meeting of supporters or members of a political party or movement, especially in the United States. The exact definition varies among political cultures....
 of the governing party. Opposition parties and the media attacked Premier Pat Binns
Pat Binns

Patrick George Binns , is a Canada diplomat who was named Ambassador to the Republic of Ireland on August 30, 2007.Binns has a long history of public service, most notably being the 30th Premier of Prince Edward Island, holding office from 1996 to 2007, during which time he was the leader of the Prince Edward Island Progressive Conservative...
 for what they saw as gerrymandering of districts. Among other things, the government adopted a map that ensured that every current Member of the Legislative Assembly
Member of the Legislative Assembly

A Member of the Legislative Assembly, or MLA, is a representative elected by the voters of an electoral district to the legislature or legislative assembly of a subnational jurisdiction....
 from the premier's party had a district to run in for re-election, whereas in the original map, several had been redistricted. Despite this, in the 2007 provincial election
Prince Edward Island general election, 2007

The 63rd Prince Edward Island general election was held on May 28 2007. It elected members of the Legislative Assembly of Prince Edward Island of the Province of Prince Edward Island, Canada....
 only seven of 20 incumbent Members of the Legislative Assembly were re-elected (seven did not run for re-election).

The current federal electoral district boundaries in Saskatchewan
Saskatchewan

Saskatchewan is a prairie provinces in Canada, which has an area of 588,276.09 square kilometres and a population of 1,015,895 , mostly living in the southern half of the province....
 have also been labelled as gerrymandered — the province's two major cities, Saskatoon
Saskatoon

Saskatoon is a city located in central Saskatchewan, Canada, on the South Saskatchewan River, with a metropolitan area population of 233,923. Saskatoon is the most populous city in the province of Saskatchewan, and has been since the mid-1980s when it surpassed the provincial capital of Regina, Saskatchewan....
 and Regina
Regina, Saskatchewan

Regina is the capital of Saskatchewan, Canada. The city is the second largest in the province , and is a cultural and commercial metropole for both southern Saskatchewan and adjacent areas in the neighbouring American states of North Dakota and Montana....
, are both "cracked" into four districts each when the populations of the cities proper would justify about three and two and a half all-urban (or mostly-urban) districts respectively - the map instead groups parts of the New Democratic Party
New Democratic Party

The New Democratic Party is a political party in Canada with a progressivism social democracy philosophy that contests elections at both the federal and provincial levels....
-friendly cities with large Conservative
Conservative Party of Canada

The Conservative Party of Canada , colloquially known as the Tories, is a major political party in Canada, formed by the merger of the Canadian Alliance and the Progressive Conservative Party of Canada....
-leaning rural areas.

At the time the districts were created in their largely present form in the mid-1990s, it was alleged that they were intended to give the NDP and Liberals a better chance of winning seats including much of the province's rural hinterlands at the expense of the then-extant Reform Party
Reform Party of Canada

The Reform Party of Canada was a Canada federation political party that existed from 1987 to 2000. It was originally founded as a Western Canada-based protest party, but attempted to expand eastward in the 1990s....
. If that was the intention it has backfired, as in 1997 Reform took three of the four Saskatoon seats thanks largely to strong rural support, in 2000 their successors the Canadian Alliance
Canadian Alliance

The Canadian Alliance , formally the Canadian Reform Conservative Alliance , was a Canada Conservatism political party that existed from 2000 to 2003....
 added the remaining Saskatoon seat plus one in Regina and in 2004 the CA's successors the Conservatives added the NDP's two remaining Regina seats to shut the NDP out of the province. Since then the Conservatives have held the seven districts in question, while the NDP holds no seats in the province despite commanding a strong proportion of the vote especially in the cities. Polling data shows the Tories could probably not have swept either of these cities had they contained all-urban or mostly-urban constituencies. Perhaps not surprisingly, neither the federal Conservatives nor the new centre-right Saskatchewan Party
Saskatchewan Party

The Saskatchewan Party is a centre-right political party in the Canada Provinces and territories of Canada of Saskatchewan. The party was established in 1997 by a coalition of former Progressive Conservative Party of Saskatchewan and Saskatchewan Liberal Party party members and supporters who sought to remove the Saskatchewan New Democratic...
 government has expressed any interest in changing the map, notwithstanding the fact that it was not their creation.

Chile


After Chileans voted General Augusto Pinochet out of power in a 1988 plebiscite, the military government began working on a law to define the new electoral system for the 1989 elections. The 60 electoral districts
Electoral division of Chile

Electoral division of Chile. To elect members of the Chamber of Deputies of Chile and of the Senate of Chile, Chile is divided into electoral districts and senatorial constituencies....
 for the Chamber of Deputies
Chamber of Deputies of Chile

The Chamber of Deputies of the Republic of Chile is the lower house of Chile's Bicameralism National Congress of Chile. Its organisation and its powers and duties are defined in articles 42 to 59 of Chile's current Constitution of Chile....
 (lower house) were designed so that — if the results of the 1988 plebiscite were extrapolated to the coming parliamentary elections — in no district would the NO option outpoll the YES option by more than 2:1. (The NO option was for removing Pinochet from power and to trigger democratic elections.) The rationale for this — in a system in which only two candidates are elected per district and where a coalition needed twice the vote of the opponent to gain both district seats — was that the voters who favoured the NO option would vote for the Centre-Left coalition, which opposed the Pinochet dictatorship, and the ones that favoured the YES option would be inclined to vote for the candidates of the right
Alliance for Chile

The Alliance for Chile , also known as La Alianza , is a coalition of right-wing Chilean political parties. It includes the National Renewal and the Independent Democratic Union ....
, which supported the military government.

In the Senate
Senate of Chile

The Senate of the Republic of Chile is the upper house of Chile's Bicameralism National Congress of Chile, as established in the current Constitution of Chile....
 —where a whole administrative region
Regions of Chile

||-||}Chile is divided into 15 regions , each of which is headed by an intendant , appointed by the President of Chile.The regions have formally both a name and a Roman numeral , with the numbers originally assigned in sequence from north to south ....
 consists of one or two constituencies— gerrymandering of districts had a limited effect. Therefore, the government, to ensure that the winning majority (the Center-Left coalition, as it was expected) would be unable to reach the quorum
Quorum

In law, a quorum is the minimum number of members of a deliberative body necessary to conduct the business of that group. Ordinarily, this is a majority of the people expected to be there, although many bodies may have a lower or higher quorum....
 necessary to change the Constitution
Constitution of Chile

In its temporary dispositions, the document ordered the transition from the former military government, with Augusto Pinochet as President of the Republic, and the Legislative Power of the Military dictatorship , to a civil one, with a time frame of eight years, during which the Legislative Power would still be the Military Junta....
 by itself, allocated a number of seats to appointed senators. These unelected senators were eliminated in the 2005 constitutional reforms, but the electoral map remains untouched.

Germany

When the electoral districts in Germany
Germany

Germany , officially the Federal Republic of Germany , is a country in Central Europe. It is bordered to the north by the North Sea, Denmark, and the Baltic Sea; to the east by Poland and the Czech Republic; to the south by Austria and Switzerland; and to the west by France, Luxembourg, Belgium, and the Netherlands....
 were redrawn in 2000, the ruling Social Democratic Party (SPD
Social Democratic Party of Germany

The Social Democratic Party of Germany is Germany's oldest political party. After World War II, under the leadership of Kurt Schumacher, the SPD reestablished itself as an ideological party, representing the interests of the working class and the trade unions....
) was accused of gerrymandering to marginalize the socialist PDS
Left Party (Germany)

The Party of Democratic Socialism was a socialism political party active in Germany from 1989 to 2007. It was the legal successor to the Socialist Unity Party of Germany , which ruled the German Democratic Republic until 1990....
 party. The SPD combined traditional PDS strongholds in eastern Berlin
Berlin

Berlin is the Capital of Germany city and one of sixteen States of Germany of Germany. With a population of 3.4 million within its city limits, Berlin is the country's largest city....
 with new districts made up of more populous areas of western Berlin, where the PDS had very limited following.

After having won four seats in Berlin in the 1998 national election, the PDS was able to retain only two seats altogether in the 2002 elections. Under German electoral law, a political party
Political party

A political party is a political organization that seeks to attain and maintain politics power within government, usually by participating in electoral campaigns....
 has to win either more than five percent of the votes, or at least three directly-elected seats, to qualify for top-up seats under the Additional Member System
Additional Member System

The Additional Member System is a branch of voting systems in which some representatives are elected from geographic constituencies and others are elected under proportional representation from a wider area, usually by party-list proportional representation....
. The PDS thus were unable to qualify for top-up seats and were confined to just two members of the Bundestag
Bundestag

The 'Bundestag' is the parliament of Germany. It was established with Germany's constitution of 1949 and is the successor of the earlier Reichstag ....
, the German federal parliament
Parliament

A parliament is a legislature, especially in those countries whose system of government is based on the Westminster system modeled after that of the United Kingdom....
. But the elected representatives held their seats as individuals. In the election of 2005, the PDS (renamed the "Left Party") gained 8.7% of the votes and thus qualified for top-up seats.

However, the number of Bundestag seats of parties which traditionally get over 5% of the votes cannot be affected very much by gerrymandering, because seats are awarded to these parties on a proportional basis. Only when a party wins so many districts in any one of the 16 federal states that those seats alone count for more than its proportional share of the vote in that same state does the districting have some influence on larger parties — those extra seats, called "Überhangmandate
Overhang seat

Overhang seats can arise in elections under the traditional mixed member proportional system, when a party is entitled to fewer seats as a result of party votes than it has won constituency....
", remain.

Greece

Gerrymandering has been rather common in Greek history since organised parties with national ballots only appeared after the 1926 Constitution. The only case before that was the creation of the Piraeus electoral district in 1906, in order to give the Theotokis party a safe district. The most infamous case of gerrymandering was in the 1956 elections, which was incidentaly the first election where women voted. While in all other post World War II
World War II

World War II, or the Second World War , was a global military conflict which involved a Participants in World War II, including all of the great powers, organised into two opposing military alliances: the Allies of World War II and the Axis powers....
 national elections the districts were based on the prefecture
Prefecture

Prefecture indicates the office, seat, territorial circumscription of a Prefect. The term prefecture is also used to refer to offices analogous to prefectures....
 (??µ??) for 1956 the country was split in districts of varying sizes, others being the size of perfectures, others the size of sub-prefectures (epa???a) and others somewhere inbetween. In small districts the winning party would take all seats, in intermediate size it would take most and there was proportional representation in the largest districts. The districts though were chosen in such a way that small districts were those that traditionally voted for the right while large districts were those that voted against the right. This system has become known as the three-phase (t??fas???) system or the baklava system (because, as baklava is split into full pieces and corner pieces, the country was also split into disproportionate pieces). The opposition, being composed of the center and the left, formed a coalition with the sole intent to change the electoral law to be more representative and call new elections, despite the fact that only 7 years earlier the center and the left had fought each other in the Greek Civil War
Greek Civil War

The Greek Civil War , fought from 1946 to 1949 by the Governmental forces, receiving logistical support by the United Kingdom at first and later by the United States, and the Democratic Army of Greece , the military branch of the Communist Party of Greece , was the result of a highly polarized struggle between leftists and rightists which sta...
. Despite the opposition winning the popular vote (1,620,007 votes against 1,594,992), the right wing ERE
ERE

ERE can stand for:*ERE Informatique, a French video game company* Eastern Roman Empire, a reference to the Roman Empire during the Middle Ages...
 won the majority of seats (165 to 135) and was to lead the country for the next 2 years.

Ireland

Until the 1980s Dáil
Dáil Éireann

is the principal chamber of the Oireachtas . It is directly elected at least once in every five years under the system of proportional representation by means of the Single Transferable Vote ....
 boundaries in the state of Ireland
Republic of Ireland

Ireland is an Island country in north-western Europe. The modern Sovereignty state occupies about five-sixths of the island of Ireland, which was partitioned by the British on 3 May 1921....
 were drawn not by an independent commission but by government ministers. Successive arrangements by governments of all political characters have been attacked as gerrymandering. Ireland uses the Single Transferable Vote
Single transferable vote

The Single transferable vote is a voting system of preferential voting designed to minimize wasted votes and provide proportional representation while ensuring that votes are explicitly expressed for individual candidates rather than for party lists....
 and as well as the actual boundaries drawn the main tool of gerrymandering has been the number of seats per constituency used, with three-seat constituencies normally benefiting the strongest parties in an area, whereas four-seat constituencies normally helped the second strongest party.

In 1947 the rapid rise of new party Clann na Poblachta
Clann na Poblachta

Clann na Poblachta [k?lan?? n??? p??b?l?xt???] was an Ireland republican political party founded by former Irish Republican Army Chief of Staff Se?n MacBride in 1946....
 threatened the position of the governing party Fianna Fáil
Fianna Fáil

Fianna F?il ? The Republican Party , shortened to Fianna F?il is the largest political party in the Republic of Ireland. It is the leading party in a coalition government with the Green Party , which also has the support of five Independent Teachta D?la including two former Progressive Democrats ....
. The government of Éamon de Valera
Éamon de Valera

?amon de Valera was one of the dominant political figures in 20th century Ireland. His political career spanned over half a century, from 1917 to 1973; he served multiple terms as head of government and head of state, and is credited with a leading role in the authorship of the present-day Constitution of Ireland....
 introduced the Electoral Amendment Act, 1947 which increased the size of the Dáil from 138 to 147 and increased the number of three-seat constituencies from fifteen to twenty-two. The result has been described as "a blatant attempt at gerrymander which no Six County
Northern Ireland

conventional_long_name = Northern Ireland|native_name= Tuaisceart ?ireannNorlin Airlann|motto =|image_map = Europe location N-IRL2.png...
 Unionist could have bettered." The following February the 1948 general election
Irish general election, 1948

The Irish general election of 1948 was held on 4 February 1948. The 147 newly elected members of the 13th D?il assembled on 18 February when the Government of the 13th D?il in the history of the Irish state was appointed....
 was held and Clann na Poblachta secured ten constituencies instead of the nineteen they would have received proportional to their vote.

Tullymandering
In the mid-1970s, the Minister for Local Government, James Tully, attempted to arrange the constituencies to ensure that the governing Fine Gael
Fine Gael

Fine Gael ? The United Ireland Party, shortened to Fine Gael is the second largest political party in the Republic of Ireland. It claims a membership of 30,000, and is the largest parliamentary opposition party in the Oireachtas, the Irish parliament....
Labour Party
Labour Party (Ireland)

The Labour Party is a democratic socialist and social democratic political party in the Republic of Ireland. Founded by James Connolly in 1912 as the political wing of the Irish Congress of Trades Unions, it claims to be the country's oldest continuous political party....
 National Coalition
Government of the 20th Dáil

The 20th D?il was elected at the Irish general election, 1973 on 28 February 1973 and first met on 14 March when the 14th Government of Ireland was appointed....
 would win a parliamentary majority. The Electoral (Amendment) Act 1974
Electoral (Amendment) Act 1974

The Electoral Act 1974 was a review of Parliamentary constituencies in the Republic of Ireland passed in the Republic of Ireland by the governing Fine Gael?Labour Party Government of the 20th D?il....
 was planned as a major reversal of previous gerrymandering by Fianna Fáil (then in opposition). Tully ensured that there were as many as possible three-seat constituencies where the governing parties were strong, in the expectation that the governing parties would each win a seat in many constituencies, relegating Fianna Fáil to one out of three. In areas where the governing parties were weak, four-seat constituencies were used so that the governing parties had a strong chance of still winning two. The election results created substantial change, as there was a larger than expected collapse in the vote, with Fianna Fáil winning a landslide victory, two out of three seats in many cases, relegating the National Coalition parties to fight for the last seat. Consequently, the term Tullymandering was used to describe the phenomenon of a failed attempt at gerrymandering.

Latvia


In 1989 and 1990 elections, some accused the Popular Front of Latvia
Popular Front of Latvia

The Popular Front of Latvia was a political organization in Latvia in late 1980s and early 1990s which led Latvia to its independence from the Soviet Union....
 (PFL) of gerrymandering in favor of ethnic Latvians. For example, in 1990 the nearly pure Latvian-ethnic Ventspils district
Ventspils District

The Ventspils District is an Districts of Latvia of Latvia, located in the Courland region, in the country's west.The district consists of 11 parishes - Ance, Latvia, Jurkalne, Pope, Latvia, Puze, Targale, Ugale, Usma, Uzava, Varve, Latvia, Ziras, Zlekas parish and Piltene town's rural territory....
 (with about 0.6% of population) was awarded 3 constituencies out of 201 (1.5%), with 2 of PFL candidates running unopposed. In 1991, most native Russians were denied citizenship
Non-citizens (Latvia)

Non-citizens or Alien in Latvian law are individuals who are not citizens of Latvia or any other country but, who, in accordance with the Latvian law "Regarding the status of citizens of the former USSR who possess neither Latvian nor other citizenship", have the right to a non-citizen passport issued by the Latvian government as well...
 and therefore had no voting rights. Naturalization of native Russians began in 1995. In 1993 the country returned to proportional representation.

Northern Ireland

In the 1920s and 1930s, the Ulster Unionist Party
Ulster Unionist Party

The Ulster Unionist Party is the more moderate of the two main Unionist political parties in Northern Ireland. Prior to the split in Unionism in the late 1960s, when the former Protestant Unionist Party began to attract more hard line support away from the UUP, it governed Northern Ireland between 1921 and 1972 as the sole Unionist party....
 created electoral boundaries for the Londonderry County Borough Council to ensure election of a Unionist council in a city where Nationalists
Irish nationalism

Irish nationalism comprises political and social movements and sentiment inspired by a love for Culture of Ireland, Gaelic language and History of Ireland, and a sense of pride in Ireland and the Irish people....
 had a marginal majority. Initially local parties drew the boundaries, but in the 1930s the province-wide government
Parliament of Northern Ireland

The Parliament of Northern Ireland was the Home Rule legislature of Northern Ireland, created under the Government of Ireland Act 1920, which existed from 22 June 1921 to 30 March 1972, when it was suspended....
 redrew them to reinforce the gerrymander. The Northern Ireland Civil Rights Association
Northern Ireland Civil Rights Association

The Northern Ireland Civil Rights Association was an organisation which campaigned for civil rights for the Roman Catholic minority in Northern Ireland during the late 1960s and early 1970s....
 was formed in part in reaction to the injustice of the gerrymander.

In 1929 the Parliament of Northern Ireland
Parliament of Northern Ireland

The Parliament of Northern Ireland was the Home Rule legislature of Northern Ireland, created under the Government of Ireland Act 1920, which existed from 22 June 1921 to 30 March 1972, when it was suspended....
 passed a bill shifting the Parliament's electoral system from the relatively proportional single transferable vote
Single transferable vote

The Single transferable vote is a voting system of preferential voting designed to minimize wasted votes and provide proportional representation while ensuring that votes are explicitly expressed for individual candidates rather than for party lists....
 (STV) to the less proportional first past the post or block voting
Block voting

Block voting and Bloc voting may refer to:*Plurality-at-large voting, a voting system with multiple winners and a checkbox ballot*Preferential block voting, a voting system with multiple winners and a preferential ballot...
 system. The only exception was for the election of four Stormont MPs to represent the Queen's University of Belfast. Many scholars believe that the boundaries were gerrymandered to underrepresent Nationalists. Some geographers and historians, for instance Professor John H. Whyte, disagree. They have argued that the electoral boundaries for the Parliament of Northern Ireland
Parliament of Northern Ireland

The Parliament of Northern Ireland was the Home Rule legislature of Northern Ireland, created under the Government of Ireland Act 1920, which existed from 22 June 1921 to 30 March 1972, when it was suspended....
 were not gerrymandered to a greater level than that produced by any single-winner election system, and that the actual number of Nationalist MPs barely changed under the revised system. Most observers have acknowledged that the change to a single-winner system was a key factor, however, in stifling the growth of smaller political parties, such as the Northern Ireland Labour Party
Northern Ireland Labour Party

The Northern Ireland Labour Party was a political party which operated from 1924 until 1987.In 1913 the Labour Party resolved to give the recently formed Irish Labour Party exclusive organising rights in Ireland ....
 and Independent Unionists.

The United Kingdom suspended the Parliament of Northern Ireland and its government in 1972. It restored the single transferable vote (STV) for elections to the Northern Ireland Assembly in the following year, using the same definitions of constituencies as for the Westminster Parliament. Currently in Northern Ireland, all elections use the STV except those for positions in the Westminster Parliament, which follow the pattern in the rest of the United Kingdom by using "first past the post."

Singapore

In recent decades, critics have accused the ruling People's Action Party
People's Action Party

The People's Action Party is the main political party in Singapore. It has been the city-state's ruling party since 1959. From the Singapore general election, 1963, the PAP has dominant-party system Singapore's parliamentary democracy and has been central to the city-state's political, social, and economic development....
 (PAP) of unfair electoral practices to maintain significant majorities in the Parliament of Singapore
Parliament of Singapore

The Unicameralism Parliament of Singapore is the legislature of Singapore with the President of Singapore as its head. It currently consists of 84 Member of Parliament....
. Among the complaints are that the government uses gerrymandering.

The Elections Department
Elections Department

File:Elections Department, Jan 06.JPGThe Elections Department is a government department of the government of Singapore that oversees the procedure for elections in Singapore, including parliamentary elections in Singapore and presidential elections in Singapore....
 was established as part of the executive branch under the Prime Minister of Singapore
Prime Minister's Office

The Prime Minister's Office is a small department which provides advice to a Prime Minister in some countries:* Office of the Prime Minister ...
, rather than as an independent body. Critics have accused it of giving the ruling party the power to decide polling districts and polling sites through electoral engineering, based on poll results in previous election.Opposition parties have alleged that the Elections Department decisions have given unfair advantage to the ruling party and have affected the outcome of some electoral battles.

Critics point out the dissolution of the Group Representation Constituencies (GRC) of Cheng San GRC
Cheng San Group Representation Constituency

Cheng San Group Representation Constituency is a now defunct Group Representation Constituency in the North-East Region, Singapore region in Singapore....
 and Eunos GRC
Eunos Group Representation Constituency

Eunos, Singapore Group Representation Constituency was a group representation constituency in the north-eastern region of Singapore. This GRC existed for the Singapore general election, 1988 and Singapore general election, 1991 before being absorbed into Aljunied GRC for the Singapore general election, 1997....
. Each was dissolved by the Elections Department with voters redistributed to other constituencies after opposition parties gained ground in elections. Such action was controversial. Critics have speculated about the possibility of the Elections Department's dissolving next the Aljunied GRC
Aljunied Group Representation Constituency

File:Aljunied Group Representation Constituency locator map.pngFile:Aljunied GRC election posters, GE 2006.JPGAljunied Group Representation Constituency is a five-member group representation constituency in the North-East Region, Singapore region of Singapore....
 in the next General Elections, likely in 2010 or 2011. The opposition Workers' Party gained ground there in the General Elections in 2006, when it earned approximately 44% of the votes.

PAP strongholds, such as Tanjong Pagar GRC
Tanjong Pagar Group Representation Constituency

Tanjong Pagar Group Representation Constituency is a six-member Group Representation Constituency in Central Region, Singapore Singapore. Tanjong Pagar GRC is led by Minister Mentor Lee Kuan Yew, who is the Member of Parliament for the Tanjong Pagar division of the constituency since 1955....
 and Ang Mo Kio GRC
Ang Mo Kio Group Representation Constituency

File:Ang Mo Kio Group Representation Constituency locator map.pngFile:Anchorvale Place, Aug 06.JPGAng Mo Kio Group Representation Constituency is a six-member Group Representation Constituency in the North-East Region, Singapore region of Singapore....
, where Minister Mentor Lee Kuan Yew and Prime Minister Lee Hsien Loong respectively contest, have seldom been contested by the opposition. When Ang Mo Kio GRC was last contested in 2006, the PAP has won 66% of the votes.

United States

Traviscountydistricts
The United States has a long tradition of gerrymandering which precedes the 1789 election of the First U.S. Congress
1st United States Congress

The 1st United States Congress, consisting of the United States Senate and the United States House of Representatives, met from March 4, 1789 to March 3, 1791, during the first two years of George Washington's President of the United States, first at Federal Hall at 26 Wall Street in New York City and later at Congress Hall in Philadelphia...
. In 1788, Patrick Henry
Patrick Henry

Patrick Henry was a prominent figure in the American Revolution, known and remembered for his "Give me Liberty, or give me Death!" speech. Along with Samuel Adams and Thomas Paine, he is remembered as one of the most influential advocates of the American Revolution and Republicanism in the United States, especially in his denunciations of c...
 and his Anti-Federalist
Anti-Federalism

Anti-Federalism refers to a movement that opposed the creation of a stronger U.S. federal government and which later opposed the ratification of the United States Constitution of 1787....
 allies were in control of the Virginia
Virginia

The Commonwealth of Virginia is an United States U.S. state on the East Coast of the United States of the Southern United States. The state is known as the "Old Dominion" and sometimes as "Mother of Presidents", because it is the birthplace of Lists of United States Presidents by place of birth#By state....
 House of Delegates
Virginia House of Delegates

The Virginia House of Delegates is the lower house of the Virginia General Assembly. It has 100 members elected for terms of two years; unlike most states, these elections take place during odd-numbered years....
. They drew the boundaries of Virginia's 5th congressional district
Virginia's 5th congressional district

Virginia's fifth congressional district is a List of United States congressional districts in the commonwealth of Virginia. It covers all or part of Greene, Campbell, Bedford, Albemarle, Nelson, Fluvanna, Buckingham, Cumberland, Appomattox, Prince Edward, Charlotte, Lunenberg, Franklin, Henry, Pittsylvania, Halifax, Mecklenberg, and Brunswic...
 in an attempt to keep James Madison
James Madison

James Madison was an American politician and political philosopher who served as the List of Presidents of the United States President of the United States , and one of the Founding Fathers of the United States....
 out of the U.S. House of Representatives.

Historically, each state legislature has used gerrymandering to try to control the political makeup of its United State House delegation. Partisan legislators typically try to maximize the number of congressional delegation seats under the control of the legislature's majority party.

The practice of gerrymandering the borders of new states continued past the Civil War and into the late 19th century. Congress split territories in the Rocky Mountains
Rocky Mountains

The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
 area into separate, relatively low-population states rather than fewer, larger ones to help the Republican Party maintain control of the Presidency . By the rules for representation in the Electoral College
United States Electoral College

The Electoral College consists of the popularly elected representatives who formally elect the President of the United States and Vice President of the United States....
, each new state carried at least three electoral votes regardless of its population.

All redistricting in the United States has been contentious because it has been controlled by political parties vying for power. Under the constitution, districts for members of the House of Representatives
United States House of Representatives

The United States House of Representatives, commonly referred to as "the House", is one of the bicameralism of the United States Congress; the other is the United States Senate....
 are to be redrawn every ten years following each census
Census

A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population....
. In many states, state legislatures have redrawn boundaries for state legislative districts at the same time. When faced with losing power, however, members of some legislatures simply refused to redistrict. Early struggles for power were between rural and urban interests, as well as between political parties. The state legislature of Alabama, for instance, refused to redistrict from 1901 to the 1960s, despite changing conditions in a state that was industrializing and where population was rapidly moving to cities. Rural interests became prevalent in state politics, hampering the state's progress for most of the 20th century. In 1960, approximately a quarter of the state's population controlled the state legislature. When the state legislature could not agree on boundaries, a federal court worked with a new non-partisan body to conclude defining new districts in 1972.

Intense political battles over contentious redistricting typically take place within state legislatures responsible for creating the electoral maps. Since passage of the Voting Rights Act of 1965, federal courts may be involved to ensure that historical patterns of discrimination are not perpetuated.

This process can create strange bedfellows interested in securing reelection; in some states, Republicans have cut deals with opposing black Democratic state legislators to create majority-black districts. By packing black Democratic voters into a single district, they can essentially ensure the election of a black Congressman or reelection of a black state legislator due to the packed concentration of Democratic voters — however, the surrounding districts are more safely Republican in areas like the South, where white conservatives have increasingly shifted from the Democratic to the Republican Party in national elections in the last four decades.

In Pennsylvania, the Republican-dominated state legislature used gerrymandering to eliminate Democratic representative Frank Mascara
Frank Mascara

Frank R. Mascara is a Democratic Party politician from Pennsylvania who served four terms in the United States House of Representatives from 1995 to 2003....
. Mascara was elected to Congress in 1994. In 2002 the Republican Party altered the boundaries of his original district so much that he was pitted against fellow Democratic candidate John Murtha
John Murtha

John Patrick ?Jack? Murtha, Jr. is an Politics of the United States from the U.S. state of Pennsylvania. Murtha, a Democratic Party , has represented Pennsylvania's 12th congressional district in the United States House of Representatives since 1974....
 in the election. The shape of Mascara’s newly drawn district formed a finger that stopped at his street, encompassing his house though not the spot where he parked his car. Murtha won the election in the newly formed district.

State legislatures have used gerrymandering along racial or ethnic lines both to decrease and increase minority representation in state governments and congressional delegations. In the state of Ohio, a conversation between Republican officials was recorded that demonstrated that redistricting was being done to aid their political candidates. Furthermore, the discussions assessed race of voters as a factor in redistricting, because African-Americans had backed Democratic candidates. Republicans removed approximately 13,000 African American voters from the district of Jim Raussen, a Republican candidate for the House of Representatives, in an attempt to tip the scales in what was once a competitive district for Democratic candidates.

International election observers from the OSCE Office for Democratic Institutions and Human Rights, who were invited to observe and report on the 2004 national elections
United States presidential election, 2004

The United States presidential election of 2004 was held on Tuesday, November 2, 2004, to elect the President of the United States. It was the 55th consecutive quadrennial election for President and Vice President of the United States....
, expressed criticism of the U.S. congressional redistricting process and made a recommendation that the procedures be reviewed to ensure genuine competitiveness of Congressional election contests.

Voting Rights Act of 1965
After Reconstruction and the granting of citizenship and suffrage to freedmen, state legislatures developed new constitutions with provisions to make voter registration and elections more complicated, such as poll taxes, residency requirements, literacy tests and grandfather clause
Grandfather clause

A grandfather clause is an exception that allows an old rule to continue to apply to some existing situations, when a new rule will apply to all future situations....
s. These were designed to, and effectively succeeded in disfranchising most African Americans and many poor whites in southern states. In areas where African American and other minorities succeeded in registering, some states created districts that were gerrymandered to reduce the voting impact of minorities.

With the Civil Rights Movement and passage of the Voting Rights Act of 1965, additional federal enforcement and protections of suffrage for all citizens were enacted. Gerrymandering for the purpose of reducing the political influence of a racial or ethnic minority group was prohibited. Poll taxes for federal elections were prohibited by ratification of the Twenty-fourth Amendment
Twenty-fourth Amendment to the United States Constitution

Amendment XXIV prohibits both Congress and the states from conditioning the right to vote in United States Government elections on payment of a poll tax or other types of tax....
 in 1964, and a later Supreme Court case struck down poll taxes as a prerequisite for any election. Gerrymandering for political gain has remained possible under the Constitution.

After the Voting Rights Act of 1965 was passed, some states created "majority-minority" districts. This practice, also called "affirmative gerrymandering", was supposed to redress historic discrimination and ensure that ethnic minorities would gain some seats in government. Since the 1990s, however, gerrymandering based solely on racial data has been ruled unconstitutional by the United States Supreme Court
Supreme Court of the United States

The Supreme Court of the United States is the highest judicial body in the United States, and leads the federal United States federal courts. It consists of the Chief Justice of the United States and eight Associate Justice of the Supreme Court of the United States, who are nominated by the President of the United States and confirmed with th...
 under the Fourteenth Amendment
Fourteenth Amendment to the United States Constitution

The Fourteenth Amendment to the United States Constitution is one of the post-American Civil War Reconstruction Amendments that was first intended to secure the rights of former Slavery in the United States....
, first in Shaw v. Reno
Shaw v. Reno

Shaw v. Reno, case citation , was a United States Supreme Court case argued on April 20, 1993. The ruling was significant in the area of redistricting and racial gerrymandering....
 (1993) and subsequently in Miller v. Johnson
Miller v. Johnson

Miller v. Johnson, Case citation , was a Supreme Court of the United States case concerning "affirmative gerrymandering/racial gerrymandering", where racial minority majority electoral districts are created during redistricting to increase minority United States Congress representation....
 (1995).

The constitutionality of using racial considerations to create districts remains difficult to assess, despite past injustices. In Hunt v. Cromartie
Hunt v. Cromartie

'Hunt v. Cromartie', Case citation , was a Supreme Court of the United States case regarding the contentious 12th district of North Carolina. In an earlier case, Shaw v....
 (1999), the Supreme Court approved a racially focused gerrymandering of a congressional district on the grounds that the definition was not pure racial gerrymandering but instead partisan gerrymandering, which is constitutionally permissible. With the increasing racial polarization of parties in the South in the US as conservative whites move from the Democratic to the Republican Party, gerrymandering may become partisan and also achieve goals for ethnic representation.

In a few circumstances, the use of goal-driven district boundaries may be used for positive social goals (at least considered so from less partisan viewpoints). When the state legislature considered representation for Arizona
Arizona

The State of Arizona is a U.S. state located in the Southwestern United States of the United States. The capital and largest city is Phoenix, Arizona....
's Native American reservations, they thought each needed their own House member, because of historic conflicts between the Hopi
Hopi

The Hopi are American Indians in the United States people who primarily live on the 12,635 km? Hopi Reservation in northeastern Arizona. The Hopi Reservation is entirely surrounded by the much larger Navajo Reservation....
 and Navajo
Navajo Nation

The Navajo Nation is a semi-autonomy Native Americans in the United States homeland covering about 26,000 square miles , occupying all of northeastern Arizona, the southeastern portion of Utah, and northwestern New Mexico....
 nations. Since the Hopi reservation is completely surrounded by the Navajo reservation, the legislature created an unusual district configuration which features a fine filament along a river course several hundred miles in length to attach two Navajo regions.

In another case (frequently cited as an outrageous example of gerrymandering), the California state legislature created a congressional district that extends over a narrow coastal strip for several hundred miles. It ensures that a common community of interest will be represented, rather than the coastal areas' being dominated by inland concerns. These are illustrative of factoring in communities of common interest in drawing district boundaries.

Recent steps
In a decision
League of United Latin American Citizens v. Perry

League of United Latin American Citizens v. Perry, case citation , is a Supreme Court of the United States case in which the Court ruled that only District 23 of the 2003 Texas redistricting violated the Voting Rights Act....
 on June 28, 2006, the United States Supreme Court
Supreme Court of the United States

The Supreme Court of the United States is the highest judicial body in the United States, and leads the federal United States federal courts. It consists of the Chief Justice of the United States and eight Associate Justice of the Supreme Court of the United States, who are nominated by the President of the United States and confirmed with th...
 upheld most of a Texas congressional map engineered in 2003 by former House Majority Leader
Party leaders of the United States House of Representatives

Party leaders of the United States House of Representatives are elected by their respective parties in a closed-door caucus.The Majority Leader of the United States House of Representatives acts as the leader of the party that has a majority of the seats in the house ....
 Tom DeLay
Tom DeLay

Thomas Dale DeLay is a former member of the United States House of Representatives from Sugar Land, Texas, Texas. He was Party leaders of the United States House of Representatives 2003?2005, when his high profile legal problems forced him to step down, and is a prominent member of the Republican Party ....
. The 7-2 decision allows state legislatures to redraw and gerrymander districts as often as they like (not just after the decennial census). Thus they may work to protect their political parties' standing and number of seats, so long as they do not harm racial and ethnic minority groups. A 5-4 majority declared one Congressional district unconstitutional in the case because of harm to an ethnic minority.

Rather than allowing more political influence, some states' citizens are considering shifting redistricting authority from politicians and giving it to non-partisan commissions. For instance, Washington state created the standing
Standing Committee

In the United States Congress, standing committees are permanent legislative panels established by the United States House of Representatives and United States Senate rules....
 Washington State Redistricting Commission and Arizona the Arizona Independent Redistricting Commission. The Rhode Island Reapportionment Commission and New Jersey Redistricting Commission
New Jersey Redistricting Commission

The New Jersey Redistricting Commission is a New Jersey State Constitution body of the government of New Jersey. Like Arizona, Idaho, Hawaii, Montana, and Washington; the redistricting is completed within an independent, bipartisan commission....
 are ad hoc
Ad hoc

Ad hoc is a List of Latin phrases which means "for this [purpose]". It generally signifies a solution designed for a specific problem or task, non-generalisable and which cannot be adapted to other purposes....
 but developed the past two decennial reapportionments tied to new census data.

According to its municipal charter
Municipal charter

A city charter or town charter is a legal document establishing a municipality such as a city or town. The concept developed in Europe during the middle ages....
, the city of San Diego uses a third party commission to define district boundaries.

Justification


United States


Inherent political right
Politicians argue that because constituencies were to be made by politicians (such as the case in the United States and elsewhere), they have the right to manipulate it so that it gives them an advantage. The voters will still be represented, and an unpopular incumbent may still be unseated.

Better representation of minority groups
Gerrymandering can be used to create districts that better represent certain minorities. Such districts have been created to ensure representation for African American, Hispanic, and Asian American
Asian American

Asian Americans are United States of Asian people. They include sub-ethnic groups such as Chinese Americans, Filipino Americans, Indian Americans, Vietnamese Americans, Korean Americans, Japanese Americans and others whose national origin is from the Asia....
 ethnic communities in the USA, particularly in California
California

California is a U.S. state on the West Coast of the United States of the United States, along the Pacific Ocean. It is bordered by Oregon to the north, Nevada to the east, Arizona to the southeast, and to the south the Mexico state of Baja California....
, Texas
Texas

Texas is a U.S. state located in the South Central United States, nicknamed the Lone Star State. Texas is the second largest U.S. state in both area and population, spanning , and with a growing population of 24.3 million residents....
, and other states in the South
South

South is one of the cardinal directions and is opposite to the north.By Western world Norm , the bottom side of a map is south; the southern direction has azimuth or bearing of 180?....
.

See also

  • History of 19th century congressional redistricting in Ohio
    History of 19th Century congressional redistricting in Ohio

    The redistricting of United States congressional districts is made by the legislatures of the states every 10 years, immediately following the official announcement of the United States Census that serves as the basis of the apportionment....
  • Representation (politics)
    Representation (politics)

    In politics, representation describes how political power is alienated from most of the members of a group and vested, for a certain time period, in the hands of a small subset of the members....
  • Election fraud


External links

  • — a case study from the
  • — an article from the
  • — an article from the
  • from
  • an article from the
  • (Broken link)
  • — Draws internal US boundaries based on cultural affinities, not politics
  • an article from Mother Jones Magazine
  • — An online redistricting simulation.