George Washington
At the end of his second term, Washington retired for personal and political reasons, fatigued and disgusted with personal attacks, and to assure a truly contested presidential election could be held. He did not feel bound to a two-term limit, but his retirement ultimately set precedent. The two-term limit to the presidency was formalized with the 1951 adoption of the Twenty-second Amendment to the United States Constitution. Washington is often credited with setting the principal of a two-term presidency, but it was Thomas Jefferson who first refused to run for a third term on political grounds.
Presidency of John Adams
The presidency of John Adams, began on March 4, 1797, when John Adams was inaugurated as the second President of the United States, and ended on March 4, 1801. Adams, who had served as vice president under George Washington, took office as president after winning the 1796 presidential election. The only member of the Federalist Party to ever serve as president, his presidency ended after a single term following his defeat in the 1800 presidential election. He was succeeded by Thomas Jefferson of the Democratic-Republican Party.