On September 3, 1964, United States Attorney General Robert F. Kennedy resigned. From the article:
"Robert Kennedy
Robert Kennedy was the U.S. attorney general from 1961 to 1964 and a U.S. senator from New York from 1965 to 1968. A graduate of Harvard University and the University of Virginia School of Law, Kennedy was appointed attorney general after his brother John Kennedy was elected president in 1960. In this role, Robert Kennedy fought organized crime and worked for civil rights for African Americans. In the Senate, he was a committed advocate of the poor and racial minorities, and opposed escalation of the Vietnam War. On June 5, 1968, while in Los Angeles campaigning for the Democratic presidential nomination, Kennedy was shot. He died early the next day at age 42."