Paski is correct: the US Constitution has the supremacy clause. When Federal Law conflicts with State Law, the Federal Law takes precedence. The Reserved Powers clause of the 10th amendment does not apply in this situation. For more reading on the Supremacy Clause: https://www.law.cornell.edu/wex/supremacy_clause Edit - Whoever created that meme needs to be punched in the stomach. I highly suspect these retarded memes, memes that are clearly incorrect, are created by lefties and posted on right-wing boards/forums/groups to get them reposted to make us look bad. "Haha, look at this idiots, they don't even know what the Supremacy Clause is and they keep reposting this stupid shit. GOT 'EM!"