 In 1900, he ran for vice president with William Jennings Bryan.In doing so, he became the fourth vice president or former vice president to run for that post with two different presidential candidates (after George Clinton, John C. Calhoun and Thomas A. Hendricks).Stevenson was the grandfather of Adlai Stevenson II, a Governor of Illinois and the unsuccessful Democratic presidential nominee in both 1952 and 1956.