Franklin Pierce (November 23, 1804 – October 8, 1869) was the 14th President of the United States (1853–1857) and is the only President from New Hampshire. Pierce was a Democrat and a "doughface" (a Northerner with Southern sympathies) who served in the U.S. House of Representatives and the Senate. Pierce took part in the Mexican-American War and became a brigadier general in the Army. His private law practice in his home state, New Hampshire, was so successful that he was offered several important positions, which he turned down. Later, he was nominated as the party's candidate for president on the 49th ballot at the 1852 Democratic National Convention. In the presidential election, Pierce and his running mate William R. King won by a landslide in the Electoral College. They defeated the Whig Party ticket of Winfield Scott and William A. Graham by a 50 percent to 44 percent margin in the popular vote and 254 to 42 in the electoral vote.

He made many friends, but he suffered tragedy in his personal life; all of his children died when young. As president, he made many divisive decisions which were widely criticized and earned him a reputation as one of the worst presidents in U.S. history. Pierce's popularity in the Northern states declined sharply after he supported the Kansas–Nebraska Act, which replaced the Missouri Compromise and renewed debate over the expansion of slavery in the American West. Pierce's credibility was further damaged when several of his diplomats issued the Ostend Manifesto. The historian David Potter concludes that the Ostend Manifesto and the Kansas-Nebraska Act were "the two great calamities of the Franklin Pierce administration.... Both brought down an avalanche of public criticism."^{[citation needed]} More importantly, says Potter, they permanently discredited Manifest Destiny and "popular sovereignty" as political doctrines.