Southerners viewed the country's expansion as a threat to their interests, leading to tensions between North and South over economic and slavery-related issues.
Southerners viewed the country's expansion as: A. an unwelcome way for the North to gain power in Congress. Southerners believed that the measures pushed by the North were promoting an antislavery agenda and threatening their power and interests.
After the panic in the economic downturn, northern Republicans and Democrats sought an increase in tariffs to prevent future economic problems.
Ohio River served as a dividing line for slavery, leading to a struggle to maintain balance between free and slaveholding states during expansion.
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