Twenty-second Amendment to the United States Constitution
The President of the United States is elected to have that position for a period, or "term", that lasts for four years. The Constitution had no limit on how many times a person could be elected as president. The nation’s first president, George Washington chose not to try to be elected for a third term. This suggested that two terms were enough for any president. Washington’s two-term limit became the unwritten rule for all Presidents until 1940.