The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states regarding the status of territories acquired during the Mexican–American War (1846–1848). The compromise, drafted by Whig Senator Henry Clay of Kentucky and brokered by Clay and Democratic Senator Stephen Douglas of Illinois, reduced sectional conflict. Controversy arose over the Fugitive Slave provision. The Compromise was greeted with relief, although each side disliked specific provisions.
The Compromise became possible after the sudden death of President Zachary Taylor, who, although a slave owner, had favored excluding slavery from the Southwest. Whig leader Henry Clay designed a compromise, which failed to pass in early 1850, due to opposition by both pro-slavery southern Democrats, led by John C. Calhoun, and anti-slavery northern Whigs. Upon Clay's instruction, Douglas then divided Clay's bill into several smaller pieces and narrowly won their passage over the opposition of those with stronger views on both sides.
Soon after the start of the Mexican War, when the extent of the contested territories was still unclear, the question of whether to allow slavery in those territories polarized the Northern and Southern United States in the most bitter sectional conflict up to this time. A state the size of Texas attracted interest from both state residents and pro and anti-slavery camps on a national scale. Texas claimed land north of the 36°30' demarcation line for slavery set by the 1820 Missouri Compromise.
The Texas Annexation resolution had required that if any new states were formed out of Texas' lands, those north of the Missouri Compromise line would become free states.