That's a bit off. The question in this case was regarding a federal law that "prohibits modification or repeal of state-law prohibitions." In short, "we are m

That's a bit off. The question in this case was regarding a federal law that "prohibits modification or repeal of state-law prohibitions." In short, "we are making a law that says you have to make a law." It's not about using the states to act as enforcement of federal laws, or to comply with federal laws - it's about commandeering their regulatory authority. And, I'd say correctly, the regulatory powers reserved to the states belong to, explicitly, the states. SCOTUS was quite correct in breaking this in half.