I think you are wrong or perhaps only partially right. GA and NY are two great examples. The state governments will not go away or collapse, actually the opposite is true; unleashed from the feds, NY will go full on Commie and GA will go full on democracy/freedom. So there will be an insurgency in both states, up in NY “conservatives” will be the insurgents to be hunted down and rounded up and conversely the “leftists” will be the hunted down insurgents in GA. You cannot paint with broad brush.
No, potentially extreme examples.
In the vast majority of states sides could be more evenly matched.
Of course it's all fantasy, none of this will happen under current conditions.