McCarthy 's surprisingly strong showing in New Hampshire led to the rapid growth of his supporters , but the campaign was in increasing disarray . When Senator Robert Kennedy entered the race as a second anti-war candidate , Clark and other McCarthy advisers initially tried to broker an agreement with Kennedy to meet head-to-head only in the California primary , with both campaigns supporting the winner of that primary , but McCarthy flatly rejected the proposal . Bitterness between the McCarthy and Kennedy campaigns only deepened after Johnson announced that he would not seek re-election and Hubert Humphrey emerged as the choice of the Democratic establishment . In the wake of Kennedy 's assassination the night that he won the California primary , many Kennedy delegates to the 1968 Democratic National Convention refused to support McCarthy . McCarthy publicly conceded that Humphrey had enough delegates to win the nomination , a move that enraged Clark and other McCarthy supporters who felt that the candidate still had a chance of defeating Humphrey
1968 Democratic National Convention
1968 Democratic National Convention
Blair Clark