Union Party (United States, 1850)

The Union Party was a proslavery, unionist political party in the United States during the early 1850s. It was one of two main political parties in the slave states of Alabama, Georgia, and Mississippi, alongside the Southern Rights Party. The Georgia affiliate was known as the Constitutional Union Party. The party was organized to support the Compromise of 1850. While some figures such as Daniel Webster predicted a sweeping political realignment in which the Union Party would unite all those in favor of the Compromise measures, no national organization ever emerged. The party disbanded following acceptance of the Compromise by the Southern Rights leaders, with most former Unionists returning to their previous partisan allegiances.

Events following the Mexican–American War fueled rising tensions between the free and slave states, as proslavery fire-eaters threatened secession in response to the Wilmot Proviso. The crisis fractured the existing party system and produced an alliance between unionist Democrats and Whigs in the Lower South who sought to avert a civil war and defeat their intrapartisan rivals. Unionists were especially active in the 1851 elections, when Union parties elected 14 members to the U.S. House of Representatives and won governorships in Georgia and Mississippi. The acquiescence of the Southern Rights leaders to the Compromise after 1851 removed the need for a dedicated Union Party. Many Whigs who had supported the Union Party movement subsequently joined the Democratic Party, while most Union Democrats returned to their former political allegiance.

In states where Union parties were organized, Unionists supported preservation of the federal Union and opposed an independent Southern Confederacy. Ardently proslavery, they rejected secession as unconstitutional and ruinous to the interests of the slave states. Instead, they advocated a policy of conditional unionism wherein the slave states would remain loyal to the national government so long as the free states agreed to abide by the Compromise and abstain from any future attacks on slavery. While they opposed immediate secession, Unionists did not rule it out in the future should Southern demands go unheeded. Many who had been Unionists in the 1850s would go on to serve in the Confederate government during the Civil War, including Alexander H. Stephens, who served as vice president of the Confederacy from 1861 to 1865.