I don’t believe the states have to embrace everything the federal government says - see marijuana and enhanced IDs as examples. However the federal government

I don’t believe the states have to embrace everything the federal government says - see marijuana and enhanced IDs as examples. However the federal government often ties receiving federal funds to passing and enforcing federal policy. So don’t want to issue identification documents in compliance with the real ID act? Loose a portion of the highway funds. Want legal pot? Loose a portion of the highway funds. And so on.