confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs
union: everything else
necessary and proper clause. the congress shall have power to 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, or in any department or officer thereof.
assuming that you are talking about the one in egypt: hecka oil
explanation: