".............that states would retain authority................". Of what value is retention if 'the exercise of' is lacking? The prevailing agenda seems to accept the federal government telling the states to drop their trousers and the states not only do it but even provide additional accommodation by asking at what angle should they bend over.............
Not quite.
Some 24 or so states refused medicaid expansion [Obamacare].
Texas has sued the Feds so many times I’ve lost count [and won quite a few times].
There are examples.
Enabled and perpetuated by the 17th Amendment. It must go. As the last hundred years show, our Bill of Rights mean little if not backed up with the structure to enforce them.