sentences:  As a result of his family connection to Vanderbilt, Clark became involved in several of Vanderbilt's business ventures, including shipping, banking, and railroads.In 1856, Clark was elected to Congress as a Democrat, and he was reelected in 1858 as an Anti-Lecompton Democrat.Clark served in the Thirty-fifth and Thirty-sixth Congresses (March 4, 1857 to March 3, 1861).