Imperialism had fed into European tensions because of the high number of European countries competing for colonies all over the world.
Many Northerners were happy that free states now had more representatives in Congress. However, many were also upset with the Fugitive Slave law.
This law, that was part of the Compromise of 1850, made it so that any slave that escaped to the North must be returned to their owner in the South. Many northerners thought this was unfair and did not want to follow this law. This is because almost all northern states had outlawed slavery by this point and time.
The national government was able to raise money as it sold land in the area.
Hope this helped!
Intellectual property is just as essential to freedom as other forms of property, and just as morally justified. It secures the same type of labor and the same values as property. It thus secures the life and liberty of its owners, and provides uniquely important support to free expression and free inquiry :)