When the Republican convention began in Philadelphia that June , no vice presidential candidate had overwhelming support , but Roosevelt had the broadest range of support from around the country . McKinley affirmed that the choice belonged to the convention , not to him . On June 21 , McKinley was unanimously renominated and , with Hanna 's reluctant acquiescence , Roosevelt was nominated for vice president on the first ballot . The Democratic convention convened the next month in Kansas City and nominated William Jennings Bryan , setting up a rematch of the 1896 contest
Republican convention
1900 Republican National Convention
William McKinley