The Twenty-second Amendment of the United States Constitution sets a term limit for the President of the United States. The Congress passed the amendment on March 21, 1947. It was ratified by the requisite number of states on February 27, 1951.

Historians point to George Washington's decision not to seek a third term as evidence that the founders saw a two-term limit as convention and a bulwark against a monarchy; his Farewell Address suggests that it was because of his age that he did not seek re-election. Thomas Jefferson also contributed to the convention of a two-term limit; in 1807 he wrote, "if some termination to the services of the chief Magistrate be not fixed by the Constitution, or supplied by practice, his office, nominally four years, will in fact become for life." Jefferson’s immediate successors, James Madison and James Monroe, also adhered to the two-term principle.

Addison Mitchell "Mitch" McConnell, Jr. (born February 20, 1942), a Republican American, is the senior United States Senator from Kentucky and the Minority Leader. He is the longest serving U.S. Senator in Kentucky history.

McConnell was born in Tuscumbia, Alabama to Julia (née Shockley) and Addison Mitchell McConnell.

McConnell was raised in southern Louisville, Kentucky, where he attended the duPont Manual High School, and in 1964 he graduated with honors from the University of Louisville with a B.A. in political science. He was student body president and a member of the Phi Kappa Tau fraternity. McConnell has maintained strong ties to his alma mater, and "remains a rabid fan of its sports teams." He graduated in 1967 from the University of Kentucky College of Law, where he was elected president of the Student Bar Association.

McConnell became a member of the 100th Division (Training), U.S. Army Reserve, in Louisville, Kentucky, during his final semester of law school; and he reported for his six months of active service, primarily for training, in July 1967. After induction at Fort Knox, Kentucky, McConnell was released early from his active-duty military service in August 1967. McConnell received a medical discharge for optic neuritis, which is a common manifestation of multiple sclerosis.

Barack Hussein Obama II (ⁱ/bəˈrɑːk huːˈseɪn oʊˈbɑːmə/; born August 4, 1961) is the 44th and current President of the United States. He is the first African American to hold the office. In January 2005, Obama was sworn in as a U.S. Senator in the state of Illinois. He would hold this office until November 2008, when he resigned following his victory in the 2008 presidential election.

Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was the president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004.

Following an unsuccessful bid against the Democratic incumbent for a seat in the United States House of Representatives in 2000, Obama ran for the United States Senate in 2004. Several events brought him to national attention during the campaign, including his victory in the March 2004 Illinois Democratic primary for the Senate election and his keynote address at the Democratic National Convention in July 2004. He won election to the U.S. Senate in Illinois in November 2004. His presidential campaign began in February 2007, and after a close campaign in the 2008 Democratic Party presidential primaries against Hillary Rodham Clinton, he won his party's nomination. In the 2008 presidential election, he defeated Republican nominee John McCain, and was inaugurated as president on January 20, 2009. Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. In April 2011, he announced that he would be running for re-election in 2012.