Washington ? Former President Bill Clinton eulogized the late Minnesota Sen. Eugene J. McCarthy on Saturday for helping to shift momentum against the Vietnam War with his 1968 presidential campaign.

McCarthy, who died last month at 89, mounted an anti-war challenge to President Johnson for the 1968 Democratic nomination, leading to Johnson’s withdrawal from the race after the New Hampshire presidential primary.

About 800 people, some wearing McCarthy campaign buttons, attended the memorial. A bagpipe procession started the service, and Peter Yarrow of the folk group Peter, Paul and Mary sang “This Land Is Your Land” and other songs.

The audience was filled with friends, family members and lawmakers, including Sen. Edward M. Kennedy, D-Mass.

Two of McCarthy’s children, Michael McCarthy and Ellen McCarthy, also gave tributes at the service, as did journalist Mary Alice Williams, a family friend.