- National Defense
- Issuing currency
- Raising revenue to operate national government
- Foreign relations
- Resolving conflicts between states
- Few others
"The powers not delegated to the U.S. by the Constitution nor prohibited by it to the state, are reserved to the states respectively, or to the people.Any laws that are not regarding the above mentioned are unconstitutional and subject to such a finding by any court, especially the U.S. Supreme Court.