This is still against established law. He will be sued immediately to stop it, and a federal judge will strike it down. Anyone caught doing this is at risk, and not Trump.
Takes quite a while for them to even think about hearing the case, and if it's already challenged against exist and clear law, they'll need to come up with some serious bullshit reasons to even hear it. Either way, will take quite awhile.
I believe the playbook is to say he already expected that from the judge and attack them while appealing the decision. Chip away at it until something breaks. If the playing field is not level, you can just keep the ball in play to force a win