John Blair, Jr. was an American politician

Politics of the United States

The United States is a federal constitutional republic, in which the President of the United States , Congress, and judiciary share powers reserved to the national government, and the federal government shares sovereignty with the state governments.The executive branch is headed by the President...

, Founding Father

Founding Fathers of the United States

The Founding Fathers of the United States of America were political leaders and statesmen who participated in the American Revolution by signing the United States Declaration of Independence, taking part in the American Revolutionary War, establishing the United States Constitution, or by some...

 and jurist

Jurist

A jurist or jurisconsult is a professional who studies, develops, applies, or otherwise deals with the law. The term is widely used in American English, but in the United Kingdom and many Commonwealth countries it has only historical and specialist usage...

.

Blair was one of the best-trained jurists of his day. A famous legal scholar, he avoided the tumult of state politics, preferring to work behind the scenes. But he was devoted to the idea of a permanent union of the newly independent states and loyally supported fellow Virginia

Virginia

The Commonwealth of Virginia , is a U.S. state on the Atlantic Coast of the Southern United States. Virginia is nicknamed the "Old Dominion" and sometimes the "Mother of Presidents" after the eight U.S. presidents born there...

ns James Madison

James Madison

James Madison, Jr. was an American statesman and political theorist. He was the fourth President of the United States and is hailed as the “Father of the Constitution” for being the primary author of the United States Constitution and at first an opponent of, and then a key author of the United...

 and George Washington

George Washington

George Washington was the dominant military and political leader of the new United States of America from 1775 to 1799. He led the American victory over Great Britain in the American Revolutionary War as commander-in-chief of the Continental Army from 1775 to 1783, and presided over the writing of...

 at the Constitutional Convention

Philadelphia Convention

The Constitutional Convention took place from May 14 to September 17, 1787, in Philadelphia, Pennsylvania, to address problems in governing the United States of America, which had been operating under the Articles of Confederation following independence from...

. His greatest contribution as a Founding Father came not in Philadelphia, but later as a judge on the Virginia court of appeals and on the U.S.