Later , at the 1968 Democratic National Convention , he led the debate for the administration plank on Vietnam , which sparked public outrage . On October 15 , 1969 , he was welcomed to the green at Yale University to address the issues regarding his vote but chose to decline the offer and speak that night at his alma mater , Bates College , in Lewiston , Maine . His decision to do so was widely criticized by the Democratic party and Yale University officials . From 1967 to 1969 , he served as the chair of Democratic Senatorial Campaign Committee . He voted against the appointment of Clement Haynsworth to the U.S. Supreme Court
1968 Democratic National Convention
1968 Democratic National Convention
Edmund Muskie