What did Roger B. Taney do that increased regional tensions in the United States during the 1850s?
Taney help found the Republican Party, which was noted for its strong antislavery platform.
During that time Taney led the Supreme Court, which declared slaves to be property.
Taney declared the African Americans had the legal right to sue for their freedom in court.
Taney ruled that all fugitive slaves must be caught and returned to their masters.