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.
Federalist No. 72
The twenty-second Amendment to the Constitution imposed the present two-tier term limit on the executive branch. Today, U.S. presidents can only serve two terms, or if a succession has taken place, ten years, as president of the country.