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.
1944 United States presidential election in Minnesota
Roosevelt was the only president of the United States who was elected to more than two quadrennial terms. The 22nd Amendment, ratified on February 27, 1951, ensures that Roosevelt will continue to hold this record indefinitely, as the said amendment prohibits any person from serving more than two and a half terms as president.