Robert Kennedy 's assassination in Los Angeles on June 5 , 1968 , was a more devastating blow to O'Donnell than the assassination of President Kennedy five years earlier . He soon joined , as did many others in Kennedy 's campaign , Hubert Humphrey 's presidential campaign , serving as campaign manager . In 1970 , he made another attempt to win the Democratic nomination for governor , but finished fourth in a field of four Democrats , with just nine percent of the vote
assassination
Assassination of Robert F. Kennedy
Kenneth O'Donnell