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(1801- 1869), an American Cabinet officer, was educated in the University of Pennsylvania, studied law, and removed to Mississippi. He was Democratic U. S. Senator from that State from 1836 to 1845. He favored the annexation of Texas, and the same year refused the nomination for Vice-President. In 1845 President Polk called him to the Treasury Department which he conducted until 1849. He is identified with the "Walker revenue tariff" of 1846. He favored the warehouse system and the creation of the Interior Department. He was Governor of Kansas in 1857-1858, and during the war was U. S. financial agent in Europe.