James Madison was the 4th President of the United States and a key architect of the U.S. Constitution. Born in 1751 in Virginia, he played a crucial role in shaping the Bill of Rights and the Federalist Papers. As President from 1809-1817, he led the country through the War of 1812. Madison's contributions to American political thought and governance earned him the title of "Father of the Constitution." His legacy continues to influence American government and political theory to this day.