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

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.

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.