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 Since 1964 he had supported the presidential ambitions of Governor Nelson Rockefeller of New York, and early in 1968, with that year's elections looming, he became chairman of the "Rockefeller for President" citizens' committee. When in a televised speech on March 21, 1968, Rockefeller shocked his supporters with an apparently unequivocal withdrawal from the race, Agnew was dismayed and humiliated; despite his very public role in the Rockefeller campaign, he had received no advance warning of the decision. He took this as a personal insult and as a blow to his credibility. Within days of Rockefeller's announcement, Agnew was being