Answer:
northerners saw slavery as immoral and unjust practice
Northern farmers couldn’t compete with southern plantations supported by the labor if enslaved people
Explanation: I did the test and got 100%
They handled it decently but they were nervous for sure.
Which is based on the Supremacy Clause, federal law preempts state law, even when the laws conflict. Thus, a federal court may require a state to stop certain behavior it believes interferes with, or is in conflict with, federal law.
Labor unions at the time were formed mainly because people lived and worked in extremely bad conditions during the industrial revolution. For that reasons, labor unions wanted for the workers to work in better conditions and wanted to fight for their rights.