How did the Supreme Court uphold slavery? By denying citizenship By determining guilt By declaring slavery laws legal By defining residency

The correct answer is: By denying citizenship.

This happened in Dred Scott legal case in the Supreme Court on March 6th, 1857, it was ruled that a slave that who had resided in a free state and territory was not entitled to his freedom, in this case referring to Dred Scott. The Supreme Court stated that no African American could be a citizen of the United States. With this decision began the controversy to civil war.

The Supreme Court uphold slavery:

By declaring slavery laws legal.

In 1857, the Supreme Court issued a decision in the Dred Scott case, affirming the right of slave owners to take their slaves into the Western Territories, negating the doctrines of The Republican Party.