Answer:
Slavery
Explanation:
States' rights regarding slavery was one of the main issues dividing the North and South that led to the Civil War.
Answer: Compromise of 1850
Explanation: The Compromise of 1850 was a series of five laws that were passed in September of 1850 to deal with the issue of slavery. In 1849, California requested permission to enter the Union as a free state, potentially altering the balance between the free and the slave states in the Senate. The document was introduced as an attempt to seek a compromise between North and South and avoid a crisis.
As part of this compromise, the Fugitive Slave Act was amended and the slave trade in Washington, D. C. was abolished.
(from what I remember)
I believe it was because of the large demand for workers and the decrease in cost for slaves .
