Thomas Jefferson wrote:
“I consider the foundation of the Constitution as laid on this ground: That ” all powers not delegated to the United States, by the Constitution, nor prohibited by it to the States, are reserved to the States or to the people.” To take a single step beyond the boundaries thus specially drawn around the powers of Congress, is to take possession of a boundless field of power, no longer susceptible of any definition.”

Scary in today’s context of nationalized banks and such, huh?