Legal Powers of U.S. Government From Article I, Section 8 U.S. Constitution
Levy Taxes and make laws;
For The General Welfare:
1. International and interstate commerce (trade) 2. Naturalization 3. Bankruptcy 4. Coin Money, establish value 5. Weights and Measures 6. Punish counterfeiting 7. Postal Service 8. Issue patents and copyrights 9. Establish Federal Courts 10. Govern District of Columbia 11. Purchase real estate for necessary buildings
For the Common Defense:
1. Define and punish Maritime and international Crimes 2. Declare War 3. Make rules for, and fund Military Services
This list represents the sum total of the functions the federal government is constitutionally authorized to perform.
“The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.” ~Amendment 10, U.S. Constitution