A northern Democrat who believed that the abolitionist movement was a fundamental threat to the nation's unity, he alienated anti-slavery groups by signing the Kansas–Nebraska Act and enforcing the Fugitive Slave Act. Conflict between North and South continued after Pierce's presidency, and, after Abraham Lincoln was elected president in 1860, the Southern states seceded, resulting in the American Civil War.
Pierce was born in New Hampshire. He served in the House of Representatives from 1833 until his election to the Senate, where he served from 1837 until his resignation in 1842. His private law practice was a success, and he was appointed New Hampshire's U.S. Attorney in 1845. Pierce took part in the Mexican–American War as a brigadier general in the United States Army. Democrats saw him as a compromise candidate uniting Northern and Southern interests, and nominated him for president on the 49th ballot at the 1852 Democratic National Convention. He and running mate William R. King easily defeated the Whig Party ticket of Winfield Scott and William A. Graham in the 1852 presidential election.
