USA HISTORY

Detailed explanation-1: -The Kansas-Nebraska Act repealed the Missouri Compromise, created two new territories, and allowed for popular sovereignty.

Detailed explanation-2: -The Missouri Compromise also proposed that slavery be prohibited above the 36º 30’ latitude line in the remainder of the Louisiana Territory. This provision held for 34 years, until it was repealed by the Kansas-Nebraska Act of 1854.

Detailed explanation-3: -In 1854, the Missouri Compromise was repealed by the Kansas-Nebraska Act. Three years later the Missouri Compromise was declared unconstitutional by the Supreme Court in the Dred Scott decision, which ruled that Congress did not have the authority to prohibit slavery in the territories.

Detailed explanation-4: -The Kansas-Nebraska Act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. Kansas with slavery would violate the Missouri Compromise, which had kept the Union from falling apart for the last thirty-four years. The long-standing compromise would have to be repealed.