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 re-election; Massachusetts and the District of Columbia being alone in the Nixon/Agnew ticket not carrying them. Trying to position himself as the front-runner for 1976, Agnew campaigned widely for Republican candidates, something Nixon would not do. Despite Agnew's efforts, Democrats easily held both houses of Congress, gaining two seats in the Senate, though the Republicans gained twelve in the House. In early 1973, shortly after assuming the role of United States Attorney for the District of Maryland, George Beall opened an investigation of corruption in Baltimore County, involving public officials, architects, engineering firms, and paving contractors. Beall's target was the