Originally Posted by Literature
Actually, there are a number of laws that lead to contradictory results at the state and federal level. Often, federal legislation will include a provision that says something that indicates laws to the contrary at the state level will be preempted by the supremacy clause. Or, conversely, the federal legislation will defer to state law.
The supremacy clause only applies where the Constitution has authority though. So no. Not that the left won't try to butcher the document in some way—again. Remember real ID was nullified too.
“Experience should teach us to be most on our guard to protect liberty when the Government’s purposes are beneficent. Men born to freedom are naturally alert to repel invasion of their liberty by evil-minded rulers. The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding.” — James Madison