"[The necessary and proper clause] neither enlarges any power specifically granted; nor is it a grant of any new power to Congress; But it is merely a declaration, for the removal of all uncertainty, that the means of carrying into execution those otherwise granted are included in the grant."

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What is to be the consequence, in case the Congress shall misconstrue this part [the necessary and proper clause] of the Constitution and exercise powers not warranted by its true meaning, I answer the same as if they should misconstrue or enlarge any other power vested in them . . . the success of the usurpation will depend on the executive and judiciary departments, which are to expound and give effect to the legislative acts; and in a last resort a remedy must be obtained from the people, who can by the elections of more faithful representatives, annul the acts of the usurpers.

— James Madison