John Fitzgerald Jack Kennedy , commonly referred to by his initials JFK, was an American politician who served as the 35th president of the United States from January 1961 until his assassination in November 1963. He served at the height of the Cold War, and the majority of his presidency dealt with managing relations with the Soviet Union. A member of the Democratic Party, Kennedy represented Massachusetts in the U.S. House of Representatives and Senate prior to becoming president.Kennedy was born in Brookline, Massachusetts, the second child of Joseph P. Kennedy Sr. and Rose Kennedy. He graduated from Harvard University in 1940 and joined the U.S. Naval Reserve the following year. During World War II, he commanded a series of PT boats in the Pacific theater and earned the Navy and Marine Corps Medal for his service. After the war, Kennedy represented the 11th congressional district of Massachusetts in the U.S.