The first presidential candidate to choose his vice presidential candidate was Franklin D. Roosevelt in 1940. The last not to name a vice presidential choice, leaving the matter up to the convention, was Democrat Adlai Stevenson in 1956. The convention chose Tennessee Senator Estes Kefauver over Massachusetts Senator (and later president) John F. Kennedy. At the tumultuous 1972 Democratic convention, presidential nominee George McGovern selected Senator Thomas Eagleton as his running mate, but numerous other candidates were either nominated from the floor or received votes during the balloting. Eagleton nevertheless received a majority of the votes and the nomination, though he later resigned from the ticket, resulting in Sargent Shriver becoming McGovern 's final running mate; both lost to the Nixon - Agnew ticket by a wide margin, carrying only Massachusetts and the District of Columbia.
when did the runner up stop becoming vice president
1940