Comment by rbanffy

I don’t think it’d be easy to get a Chinese ABM to Minneapolis without anyone noticing.

What could happen in this scenario would be either local military defecting or guerrilla warfare while the US military targets them from afar. You can easily bomb anyone back to Stone Age in hours, but taking control of the ground can be a lot more challenging if the locals don’t cooperate.

Anyway, a full-on civil war is a very unlikely - and undesirable - scenario.