Dear Ebbie:
         
Here is the answer to your question.

          The Twenty-second Amendment was proposed on March 24, 1947, and ratified on February 27, 1951. The amendment imposed term limits on the office of president of the United States.

The Republicans won back both houses of Congress in the 1946 elections and this was one of several measures they implemented to prevent the abuse-of-power demonstrated by FDR.