James Madison, Jr. (March 16, 1751 (O.S. March 5) – June 28, 1836) was an American statesman and political theorist. He was the fourth President of the United States (1809–1817) and 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 inherited tobacco land and owned slaves although he spent his entire adult life as a career politician.