The local government in Chicago has utterly failed to protect its residents. It's a national disaster there, and absolutely nothing is being done to reverse it. I wouldn't support the President arbitrarily deploying the feds into Chicago. There does need to be a national discussion though. Congress needs to do something.
How many Chicago residents you want the Feds to kill? Would a couple of million be good? Or would you be fine with a mere 100,000 or so? Clearly, you would not be satisfied with less.
Just enough to make Illinois competitive in 2020.