- Adlai Ewing Stevenson II (5 February 1900 – 14 July 1965) was an American politician and statesman, noted for his skill in debate and oratory; Governor of Illinois, he was twice an unsuccessful candidate for President of the United States running against Dwight D. Eisenhower (in 1952 and 1956). Under the John F. Kennedy administration, he served as United States Ambassador to the United Nations.