Twenty-second Amendment to the United States Constitution
The Twenty-second Amendment (Amendment XXII) to the United States Constitution sets a limit on the number of times an individual is eligible for election to the office of President of the United States, and also sets additional eligibility conditions for presidents who succeed to the unexpired terms of their predecessors.
2016 United States presidential election
President Barack Obama, a Democrat and former U.S. Senator from Illinois, was ineligible to seek reelection to a third term due to the restrictions of the Twenty-second Amendment; in accordance with Section 1 of the Twentieth Amendment, his term expired at noon eastern standard time on January 20, 2017.