Yes, 42 U.S.C. 1861, et seq is the legal basis for the NSF. What’s the Constitutional basis for that law? The Congress only has the powers granted in Article I and further amendments. For example, the Congress does not have the power to regulate rents outside of federal territories. Which enumerated power enables 42 U.S.C 1861?
The Tenth Amendment clearly states, ‘The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.’ If the Constitution does not grant a power to the Congress, it does not have it and it has no more legislative authority in that regard than you or I do.
The Tenth Amendment clearly states, ‘The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.’ If the Constitution does not grant a power to the Congress, it does not have it and it has no more legislative authority in that regard than you or I do.