James Madison, Jr. (March 16, 1751 (O.S. March 5) - June 28, 1836) was an American statesman and political theorist, the fourth President of the ... Show synopsis James Madison, Jr. (March 16, 1751 (O.S. March 5) - June 28, 1836) was an American statesman and political theorist, the fourth President of the United States (1809-1817). He is hailed as the "Father of the Constitution" for being instrumental in the drafting of the United States Constitution and as the key champion and author of the United States Bill of Rights. He served as a politician much of his adult life. After the constitution had been drafted, Madison became one of the leaders in the movement to ratify it. His collaboration with Alexander Hamilton and John Jay produced the Federalist Papers (1788). Circulated only in New York at the time, they would later be considered among the most important polemics in support of the Constitution. He was also a delegate to the Virginia constitutional ratifying convention, and was instrumental to the successful ratification effort in Virginia. Like most of his contemporaries, Madison changed his political views during his life. During the drafting and ratification of the constitution, he favored a strong national government, though later he grew to favor stronger state governments, before settling between the two extremes late in his life.