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 service during the Korean War in 1951. He worked as an aide to U.S. Representative James Devereux before he was appointed to the Baltimore County Board of Zoning Appeals in 1957. In 1960, he lost an election for the Baltimore County Circuit Court, but in 1962 was elected Baltimore County Executive. In 1966, Agnew was elected Governor of Maryland, defeating his Democratic opponent George P. Mahoney and independent candidate Hyman A. Pressman. At the 1968 Republican National Convention, Agnew, who had been asked to place Richard Nixon's name in nomination, was selected as running mate by Nixon and his campaign