Buchanan, James. Fifteenth president of the United States. Was born in Franklin County, PA, April 23, 1791. Admitted to the bar, 1812. Member of Congress, 1821-31; minister to Russia, 1832-34; United States senator, 1834-45; secretary of state, 1845-49; minister to England, 1853-56. Signed Ostend Manifesto, 1854. President, 1857-61. His administration was, on the whole, unpopular. Died June 1, 1868.