I don’t know. It’s usually the other way round — urban population suppression is the hardest thing. Of course, right now, armaments in the big cities are mostly illegal handguns, not a lot of good against military weapons. If and when these folk in the cities swap their pistols for AR-15s and AKs when the cops come, then it might get very interesting in the cities.
I’m sure there will be a federal gun confiscation before they do anything.