Like, are they going to start shooting people? Probably not, probably it will go the same way as the LA invasion where the troops just kinda slink away after Trump gets distracted and Stephen Miller kidnaps all the immigrants he was looking for. But what happens if the Chicago PD tries to obstruct some operation or another on a day Trump got up on the wrong side of the bed?
(That's not a good thing! It's an abuse of the Guard!)