Adlai Ewing Stevenson II (/ˈædleɪ/; February 5, 1900 – July 14, 1965) was an American politician and diplomat who was the United States Ambassador to the United Nations from 1961 until his death in 1965. He previously served as the 31st governor of Illinois from 1949 to 1953 and was the Democratic nominee for President of the United States in 1952 and 1956, losing both elections to Dwight Eisenhower. Stevenson was the grandson of Adlai Stevenson I, the 23rd vice president of the United States.