McGovern became the choice of the liberal/dove/Bobby Kennedy group after Bobby was killed (Gene McCarthy couldn't seem to come to terms with Bobby's side, and Hubert Humphrey was frowned upon by any decent person) in 1968, but didn't run in the primaries. His efforts (and McCarthy's) drew the ire of LBJ's meatpuppet in Chicago, Dick Daley...that convention was the ultimate domestic abyss of the 1960s. McGovern would lead a reform of the nomination process over the next couple of years and rode a wave of brilliant grassroots campaigning to the Dem nomination in 1972. During the general election however the Dem Party couldn't quite bring itself together for McGovern, and his staff led by Gary Hart were not in the same league as Nixon's crew.
The hippies as a bloc did not vote for, or support, McGovern (or anybody else). Funny picture, though.