What was the relationship between racism and slavery?

Racism is "prejudice, discrimination, or antagonism directed against someone of a different race based on the belief that one's own race is superior."

When one believes he/his race is superior, he by default looks down on others. This leads to "prejudice, discrimination, or antagonism directed against someone of a different race" because he doesn't consider their feelings and/or opinions worth as much as his own if not completely worthless. In a case where one considers another as inferior he may even subjugate them.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states.