Electoral history of Herbert Hoover, who served as the 31st president of the United States (1929–1933) and 3rd United States Secretary of Commerce (1921–1928). 1920 Democratic presidential primaries: * Unpledged delegates - 165,460 (29.85%) * A. Mitchell Palmer - 91,543 (16.51%) * James M. Cox - 86,194 (15.55%) * William McAdoo - 74,987 (13.53%) * Gilbert M. Hitchcock - 37,452 (6.76%) * Edward I. Edwards - 28,470 (5.14%) * Herbert Hoover - 28,042 (5.06%) * William Jennings Bryan - 20,893 (3.77%) * - 13,179 (2.38%) * James W. Gerard - 4,706 (0.85%) First ballot: Second ballot: