Presidential candidate Sen. Eugene McCarthy, D-Minn., left, and his wife, Abigail, celebrate in Portland, Ore., in this May 29, 1968, file photo after the senator's victory in the Oregon Democratic presidential primary was forecast. McCarthy, whose insurgent campaign toppled a sitting president in 1968 and forced the Democratic Party to take seriously his message against the Vietnam War, died Saturday, Dec. 10, 2005. He was 89. (AP Photo)
Presidential candidate Sen. Eugene McCarthy, D-Minn., discusses his defeat in this Aug. 29, 1968, file photo. McCarthy, whose insurgent campaign toppled a sitting president in 1968 and forced the Democratic Party to take seriously his message against the Vietnam War, died Saturday, Dec. 10, 2005. He was 89. (AP Photo/file)
What's with the use of the word "insurgent"?