The constitutional powers of Congress are enumerated in Article I. These include the power to appropriate money, authorize borrowing, levy taxes, regulate the currency, regulate interstate commerce, establish lower federal courts, maintain the armed forces, declare war, propose amendments to the Constitution, and (in what is called the "Necessary and Proper Clause" or the "Elastic Clause") "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."
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