How did the nullification effect the north and south?

The nullification crisis heightened tensions between the North and South, as Southern states, particularly South Carolina, asserted their right to invalidate Federal Laws they deemed unconstitutional, specifically tariffs that they felt unfairly benefited Northern industry. This resistance challenged federal authority and was perceived in the North as a threat to the Union. In contrast, the South viewed nullification as a necessary measure to protect their economic interests and states' rights. Ultimately, the crisis foreshadowed the deepening sectional divide that would lead to the Civil War.