Now IF Chicago were to tell the Feds to remove the federal courthouse AND the Chicago offices of the F_I AND the Naval Station Great Lakes AND all the other federal offices in Chicago . . . well, yeah. Ain't happenin'. Might it be in the interest of national security to restore order in Chicago? Have you considered that Chicago is also a major shipping port?  https://en.wikipedia.org/wiki/Port_of_Chicago Minneapolis, MN? http://www.worldportsource.com/ports/review/USA_MN_Port_of_Minneapolis_3747.php Seattle? https://en.wikipedia.org/wiki/Port_of_Seattle Portland? https://en.wikipedia.org/wiki/Port_of_Portland_(Oregon)  Why might it be a good idea to keep the peace in these places?