Young female supporters of Senator Robert F. Kennedy in 1966 as the Senator campaigned across the country for other Democratic candidates.
Divisions within the Democratic Party over the Vietnam War and the anti-war movement defined the 1966 midterm elections and the campaign season that preceded it.
Though as he entered the Senate Kennedy supported the Johnson administration's policies in Vietnam, he spent much of his senatorial career fighting to end the war. Kennedy publicly broke with President Johnson over the Vietnam War in February 1966. (Bill Eppridge/LIFE/Time Inc.)