"Do these principles, in fine, require that the powers of the general government should be limited, and that, beyond this limit, the States should be left in possession of their sovereignty and independence? We have seen that in the new government, as in the old, the general powers are limited; and that the States, in all unenumerated cases, are left in the enjoyment of their sovereign and independent jurisdiction."
- James Madison (Federalist Paper No. 40)