Stevenson, Adlai Ewing (1900-1965), was the Democratic nominee for president of the United States in 1952 and 1956. Dwight D. Eisenhower defeated him both times. Stevenson's running mates were John J. Sparkman in 1952 and Estes Kefauver in 1956. Stevenson served as U.S. ambassador to the United Nations from 1961 until his death.