It is the POTUS (ugh) moving troops around internally. There are a lot of norms and maybe even some laws it violates, but it isn't a civil war until a significant force fights back. The Texas National Guard (and the Illinois National Guard) are arms of the Commander In Chief at the end of the day.

People think Chicago will. And while I would probably put them in a top twenty crazy ass prideful cities list, I sincerely doubt it. What I DO expect to have happen is a few morons will bring guns to the protests and get a whole lot of people gunned down and further martial law pushed to prevent organizing. And then the local Illinois national guard can take over stomping on necks and all that fun.