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 MadisonThese considerations and many others that might be mentioned prove, and experience confirms it, that artisans and manufacturers will commonly be disposed to bestow their votes on merchants.
James MadisonThe people can never willfully betray their own interests: But they may possibly be betrayed by the representatives of the people; and the danger will be evidently greater where the whole legislative trust is lodged in the hands of one body of men, than where the concurrence of separate and dissimilar bodies is required in every public act.
James Madison