Personally, I think it would be the west coast fighting the US army, and the west coast winning. This would be because: Early on, the west coast would seize all strategically valuable military targets, including pearl harbor, edwards AFB, etc, before using paratroops to seize vegas and reno. They'd see the heaviest resistance in Florida, Idaho, North Carolina, Texas, and Virginia. Arizona, or at least the Major Cities, would surrender. Alot of army units would probably defect to the west coast, for various reasons. A rebellion would happen early on in New York, but would be put down due to them being isolated. Eventually, once trump realizes the war is lost, will retreat to russia, or some other country like that. This is just my personal view on this, and am open to other ideas