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Because it repealed the Missouri Compromise
It would allow slavery to spread north of the line established by the Missouri compromise. - Novanet
The Dred Scott case decision in 1857 by the US Supreme Court did not actively effect the 1850 Missouri Compromise. The Compromise had been negated by the Kansas Nebraska Act of 1854.What was effected was the Court's ruling that the US Congress could not pass legislation on slavery. Slavery was property and was constitutional according to the ruling of the Court. Scott never became a freeman.
The general term is popular sovereignty, but this applies to many issues, not just slavery. The Kansas-Nebraska Act was passed by the US Congress on May 30, 1854 and allowed the territories of Kansas and Nebraska to vote on slavery, with violent results that should have been expected. The act abrogated the Missouri Compromise of 1820.
The solution that emerged in the Missouri Compromise was to admit Missouri as a slave state. Every other territory north of the 36 degree 30 minutes north parallel line was to be admitted as a free state where slavery was prohibited.
The Kansas-Nebraska Act repealed the Missouri Compromise of 1820 and the Compromise of 1850, specifically the provision that prohibited slavery in territories north of the 36°30’ parallel. Instead, the Act allowed for the potential expansion of slavery into those territories based on popular sovereignty.
It created the Nebraska and Kansas territories. Repealed the Missouri Compromise of 1820. Allowed settlers to determine if they wanted slavery or not.
The Kansas-Nebraska Act of 1854 essentially repealed the Missouri Compromise (1820) by allowing new states to determine whether slavery would be allowed there or not.
Many people were enraged at the Kansas-Nebraska act because it did away with the Missouri Compromise. The Kansas-Nebraska act was enacted in 1854.
The Kansas-Nebraska Act was passed in 1854. It repealed the original decision of the Missouri Compromise. It allowed states to vote whether or not to allow slavery.
West of its border. this was later repealed
The Kansas-Nebraska Act of 1854, proposed by Stephen A. Douglas of Illinois, in effect repealed the Missouri Compromise because it allowed the settlers in these two areas to decide whether or not to allow slavery. Since these territories were located north Missouri, they gave southern slaveholders an opportunity that had been closed to them since 1820.
The Kansas-Nebraska act was proposed by Senator Stephen A. Douglas of Illinois. The act repealed the Missouri Compromise and allowed white males to vote on whether an area would allow slavery.
They were part of the Missouri Compromise. The Kansas-Nebraska Act of 1854 created the territories of Kansas and Nebraska, opened new lands, repealed the Missouri Compromise of 1820, and allowed settlers in those territories to determine if they would allow slavery within their boundaries.
The Kansas-Nebraska act was proposed by Senator Stephen A. Douglas of Illinois. The act repealed the Missouri Compromise and allowed white males to vote on whether an area would allow slavery.
It allowed Slavery in the north.
The Missouri Compromise was effectively ended by the Kansas-Nebraska Act, however since there was still turmoil as to the "Bleeding Kansas" dispute, it was thought that the Kansas-Nebraska Act would be shortly overturned. The Dred Scott decision by the Supreme Court further strengthened the elimination of the Missouri Compromise and the institution of slavery north of the Mason-Dixon Line by ruling that slaves were not able to take cases to court.