John F. Kennedy's tenure as the 35th president of the United States began with his inauguration on January 20, 1961, and ended with his assassination on November 22, 1963. Kennedy, a Democrat from Massachusetts, took office following his narrow victory over Republican incumbent vice president Richard Nixon in the 1960 presidential election. He was succeeded by Vice President Lyndon B. Johnson.
Kennedy's time in office was marked by Cold War tensions with the Soviet Union and Cuba. In Cuba, a failed attempt was made in April 1961 at the Bay of Pigs to overthrow the government of Fidel Castro.