There is nothing in the constitution that says that states must enforce Federal laws.
According to the Supremes with the Arizona immigration bill, states can’t enforce federal law......
I believe the way the opinion was written, states can’t enforce any federal law! My opimion is one of an Engineer and not a lawyer, but reading for comprehension is stressed in my profession too!
This would all clear up if a few states started treating a few of the other amendments like some states treat the second.
Let’s say TN passed a law limiting the maximum total percentage of income tax paid by its citizens to 10%, thus restricting the 16th Amrndment.
Let’s say Arizona stopped issuing birth certificates (those ain’t Federal!) to children of the undocumented, infringing on the current interpretation of the 14th.
Let’s say TX decided they would elect one Senator but appoint the other from the legislature, restricting the 17th amendment.
It would be great fun to watch!