Twenty-fifth Amendment to the United States Constitution
On October 10, 1973, Vice President Spiro Agnew resigned.  Two days later, President Richard Nixon nominated United States Representative Gerald Ford of Michigan to be the new Vice President. According to Section 2, more than 50% of each House of Congress had to approve Ford as Vice President.  By December 6, 97% of the Senate and 92% of the House had approved Ford.  Ford was sworn in to the Vice Presidency later on December 6 before both Houses of Congress.  Ford is the only person in United States history ever to be Vice President, and later President, without being elected to either office.