Constitutional lawyers usually think of the Constitution\u27s enumeration of congressional powers as a device for limiting the federal government\u27s legislative jurisdiction. And there\u27s something to that. But considered from the point of view of the Constitution\u27s drafters, it makes more sense to think of the enumeration of congressional powers as primarily a device for empowering Congress, not limiting it. The Framers wanted both to empower and to limit the general government, and the Constitution\u27s enumeration of congressional powers makes more sense as a means of empowerment than as a means of limitation. The major exception--that is, the one significant way in which enumerating congressional powers would have made sense as a...