Complex sentence: Davis was elected as a Democrat to the Thirty-fourth Congress to fill the vacancy caused by the resignation of William A. Richardson and served from November 4,1856 to March 3,1857.
Split into simpler sentences: Davis was elected as a Democrat to the Thirty-fourth Congress to fill the vacancy caused by the resignation of William A. Richardson. He served from November 4,1856 to March 3,1857.