Because of the compromises delegates reached, the work of the Constitutional Convention was never approved by the states.
led the country into a new war.
weakened the central government.
strengthened the central government.

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.

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a system of cooperative federalism emerged, as the powers of the federal government expanded.