who was assassinated in 1968 while campaigning for the presidency
United States presidential election, 1968 Incumbent Democratic President Lyndon B. Johnson had been the early front-runner for his party's nomination, but he announced his withdrawal from the race after anti-Vietnam War candidate Eugene McCarthy finished second in the New Hampshire primary. McCarthy, former Attorney General Robert F. Kennedy, and Vice President Humphrey emerged as the three major candidates in the Democratic primaries until Kennedy was assassinated in June 1968. Humphrey won the presidential nomination at the 1968 Democratic National Convention, which saw numerous anti-war protests. Nixon entered the 1968 Republican primaries as the front-runner, and he defeated Nelson Rockefeller, Ronald Reagan, and other candidates at the 1968 Republican National Convention to win his party's nomination. Governor George Wallace of Alabama ran on the American Independent Party ticket, campaigning in favor of racial segregation.
Vice President of the United States Of the thirteen presidential elections from 1956 to 2004, nine featured the incumbent president; the other four (1960, 1968, 1988, 2000) all featured the incumbent vice president. Former vice presidents also ran in 1984 (Walter Mondale) and in 1968 (Richard Nixon, against the incumbent vice president, Hubert Humphrey). The presidential election of 2008 was the first presidential election since 1928 that saw neither an incumbent president nor an incumbent or former vice president take part in any primary or general election for the presidency on a major party ticket. Nixon is the only vice president to have been elected president while not an incumbent, as well as the only person elected twice to both the presidency and vice presidency.