Complex sentence: He served as a Democrat in the United States House of Representatives from 1929 to 1941; after the death of U.S. Senator Pat Harrison, Doxey won a special election to his seat, and served in the United States Senate from 1941 until 1943.
Split into simpler sentences: He served as a Democrat in the United States House of Representatives from 1929 to 1941. After the death of U.S. Senator Pat Harrison, Doxey won a special election to his seat, and served in the United States Senate from 1941 until 1943.