Vice President of the United States the Twenty-fifth Amendment established a procedure for filling such a vacancy: This procedure has been implemented twice since the amendment came into force. The first instance occurred in 1973 following the October 10 resignation of Spiro Agnew, when Gerald Ford was nominated by President Richard Nixon and confirmed by Congress. The second occurred 10 months later following Ford's August 9, 1974 accession to the presidency upon Nixon's resignation, when Nelson Rockefeller was nominated by President Ford and confirmed by Congress. Had it not been for this new constitutional mechanism, the vice presidency would have remained vacant after Agnew's resignation and
Spiro Agnew was unclear if Agnew would be his running mate, and it was not until July 21 that Nixon asked Agnew and the vice president accepted. A public announcement was made the following day. Nixon instructed Agnew to avoid personal attacks on the press and the Democratic presidential nominee, South Dakota Senator George McGovern, to stress the positives of the Nixon administration, and not to comment on what might happen in 1976. At the 1972 Republican National Convention in Miami Beach, Agnew was greeted as a hero by delegates who saw him as the party's future. After being nominated for a