Final answer:
In the case of Dred Scott v. Sandford, the Supreme Court ruled that slaves who were taken to free states would not be considered free. The decision also declared the Missouri Compromise of 1820 to be unconstitutional.
Step-by-step explanation:
The Supreme Court ruled in the case of Dred Scott v. Sandford that slaves who were taken to free states would not be considered free. In the majority opinion written by Chief Justice Roger B. Taney, the Court held that African Americans, whether free or enslaved, were not considered citizens under the Constitution and therefore had no rights to sue in federal court. The decision also declared the Missouri Compromise of 1820, which prohibited slavery in certain territories, to be unconstitutional.
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