Humphrey first entered presidential politics in 1952, running as a favorite son candidate in Minnesota. In 1960, he mounted a full-scale run, winning primaries in South Dakota and Washington D.C.; ultimately losing the Democratic nomination to Massachusetts Senator and future President John F. Kennedy. In 1964, with Lyndon Johnson now as president following the assassination of Kennedy, Johnson tapped Humphrey as his running mate and went on to win in a landslide victory over Republican Barry Goldwater. As Vice President, Humphrey oversaw turbulent times in America, including race riots and growing frustration and anger over the large number of casualties in the Vietnam War. President Johnson's popularity plummeted as the election grew closer.