In the Dred Scott Case, the Supreme Court ruled that slaves were not citizens and therefore they could not sue. What was the importance of this case?

In Dred Scott v. Sandford (argued 1856 -- decided 1857), the Supreme Court ruled that Americans of African descent, whether free or slave, were not American citizens and could not sue in federal court. The Court also ruled that Congress lacked power to ban slavery in the U.S. territories.

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