Do you remember how FedGov strong-armed the states into setting the 55 mph speed limit and raising the drinking age to 21? Comply or we withhold road funding. (Of course we’ll continue to collect Federal gasoline taxes because we can).
Was that ever declared unconstitutional?
No, because the speed limit and the drinking age are related to FHWA Highway funding by the Feds. Granted, the tie to the drinking age is weak, but the fed gov does fund some stop drunk driving programs