Answer:
The Supreme Court's decision of March 6, 1857 which was headed by Chief Justice Taney.
Explanation:
The Supreme Court's decision of March 6, 1857 which was headed by Chief Justice Taney met a lot of criticisms from the Northerners as they felt that the decision revealed prosouthern bias.
The court ruled out that African-Americans were not citizens of the country, rendered the Missouri Compromise as unconstitutional and declared that Congress had power to abolish slavery in federal territories. Through these evidences and decisions, the northerners felt that Taney's decision revealed prosouthern bias as the outcome of the decision was more favorable to Southern states.
