Many northerners opposed the admission of Missouri to the Union because they feared it would increase the power of the slave states in Congress.

Question

Quizplus · Accepted Answer

This is true. The admission of Missouri as a slave state would upset the balance between free and slave states in Congress, which had been maintained since the Missouri Compromise of 1820. Many northerners were concerned that this would tip the scales in favor of the slave states and threaten their political power.

Many Northerners Opposed the Admission of Missouri to the Union