the constitutional amendment limiting the president to only two elected terms is the
Twenty-second Amendment to the United States Constitution Near the end of the 1944 campaign, Thomas Dewey announced support of an amendment that would limit future presidents to two terms. According to Dewey, "four terms, or sixteen years (which is what Roosevelt would have served had he lived until 1949), is the most dangerous threat to our freedom ever proposed."[5] The Republican-controlled 80th Congress approved a Joint resolution "proposing an amendment to the Constitution relating to the terms of office of the president". in March 1947;[6] it was signed by Speaker of the House Joseph W. Martin and acting President pro tempore of the Senate William F. Knowland.[7] The ratification process for the 22nd Amendment was completed on February 27, 1951, 7003143900000000000♠3 years, 343 days after it was sent to the states. The new amendment's 2-term limit did not apply (due to the grandfather clause in Section 1) to the incumbent president, Harry S. Truman. He remained eligible for election to more than two terms.[6]