The dissent claims that we “fai[l] to explain why the individual mandate threatens our constitutional order.” Ante, at 35. But we have done so. It threatens that order because it gives such an expansive meaning to the Commerce Clause that all private conduct (including failure to act) becomes subject to federal control, effectively destroying the Constitution’s division of governmental powers. Thus the dissent, on the theories proposed for the validity of the Mandate, would alter the accepted constitutional relation between the individual and the National Government. The dissent protests that the Necessary and Proper Clause has been held to include “the power to enact criminal laws, . . . the power to imprison, . . . and the power to create a national bank,” ante, at 34–35. Is not the power to compel purchase of health insurance much lesser? No, not if (unlike those other dispositions) its application rests upon a theory that everything is within federal control simply because it exists.