Nathan Clifford
…He represented Maine in the U.S. House of Representatives from 1839 to 1843, then served in the administration of President James K. Polk as the U.S. Attorney General from 1846 to 1848 and as the U.S. Ambassador to Mexico from 1848 to 1849. In the latter office, he signed the Treaty of Guadeloupe Hidalgo. In 1858…