Stanton 's relationship with Benjamin Tappan expanded when Tappan was elected the United States Senator from Ohio in 1838 . Tappan asked Stanton to oversee his law operations , which were based in Steubenville . When his time as county prosecutor was finished , Stanton moved back to the town with his wife . Stanton 's work in politics also expanded . He served as a delegate at the Democrats ' 1840 national convention in Baltimore , and was featured prominently in Martin Van Buren 's campaign in the 1840 presidential election , which Van Buren lost
1840 national convention
1840 Democratic National Convention
Edwin Stanton