jackson was elected as a democrat to the fifty-seventh congress (march 4, 1901 – march 3, 1903). while in congress he introduced a bill proposing government ownership of telegraph lines which attracted considerable attention. he was an unsuccessful candidate for reelection in 1902, but in 1904 jackson was a delegate to the democratic national convention that nominated alton b. parker and henry g. davis. he resumed the practice of law in winfield, kansas, and died there on june 11, 1924. he was interred at the highland mausoleum in winfield.