History doesn't repeat, but it rhymes, something like that? I think we are indeed watching the fascist takeover, and economic collapse is under way -- it's just when you watch a giant fall, they seem to fall oh ever so slowly, the scale distorts the speed until it's right there, then it's "suddenly" a cliff drop.

I agree with you, one dimension of the cultural split is urban / rural. The other dimension is actual culture as based on history -- deep south, southwest, cascadia, breadbasket, eastern seaboard -- these areas have different enough cultural heritage you could see them as separate regions if you squint hard enough. But the key deciding factor are the centers of military power -- where the major air, navy, and nuclear bases are. Overlay that over the cultural map, and you get the Independent Regions. The urban centers would define the voronoi centers of the subregions, with rural areas becoming more of no-mans-land, roving-bands boundary scenarios.

I mean yes it all sounds fantastical, but most unprecedented things do until they come to pass. There's so many patterns and echoes that gently indicate that this unfortunately may indeed be the way.