Explain what happened to Dred Scott & what the court ruled.

Explanation:

Sandford, legal case in which the U.S. Supreme Court on March 6, 1857, ruled (7–2) that a slave Dred Scott who had resided in a free state and territory where slavery was prohibited was not thereby entitled to his freedom that African Americans were not and could never be citizens of the United States

Taney dictaminó que Cualquier persona descendiente de africanos, ya sea esclava o libre, no es ciudadana de los Estados Unidos, de acuerdo con la Constitución. La Ordenanza de 1787 no podía conferir ni libertad ni ciudadanía dentro del Territorio del Noroeste a individuos no blancos.

Explanation:

the respondent is the party against whom a petition is filed