Complex sentence: Ellison was elected as a Republican to the Seventy-eighth Congress (January 3,1943-January 3,1945), but was an unsuccessful candidate for reelection in 1944 to the Seventy-ninth Congress.
Split into simpler sentences: Ellison was elected as a Republican to the Seventy-eighth Congress (January 3,1943-January 3,1945). He was an unsuccessful candidate for reelection in 1944 to the Seventy-ninth Congress.