The Kansas-Nebraska Act continued the ideas of the Missouri Compromise and the Compromise of 1850. The Act, which was passed in 1854, allowed for the possibility of slavery expanding into territories north of the 36°30' line established by the Missouri Compromise, and also repealed the provision prohibiting slavery in the northern parts of the Louisiana Purchase outlined by the Compromise of 1850. It did not directly continue the ideas of the Free Soil Party, which advocated for the prohibition of slavery in new territories, or the Dred Scott v. Sanford case, which reinforced the constitutional protection of slavery.
What would the answer be?
The answer is the Missouri Compromise and the Compromise of 1850.
