I've had an idea called Rust Belt Rumble, set in the "rust belt" (obviously) after an unspecified apocalypse. I've been writing various informational texts for it, concentrating on those cities of Michigan I actually know things about (names in parentheses are corrupted forms in Rural Hick Pidgin):
Grand Rapids
Grand Rapids is the last beacon of civilization in west Michigan, depending on one's definition of civilization. The Hipster Republic nominally presides, but now it is largely a puppet of the Scamway Corporation, which is interesting because it exemplifies what led to the downfall of capitalism: corporations able to make obscene amounts of money from doing absolutely nothing productive. The Hipster Republic professes to be tolerant and progressive, albeit "ironically", but its actual policies, under the influence of the DuRess and Van Skandel families, are right-wing conservative on par with those of the New Michigan Dominion. A group of rebels known as Ford's Patriots, after the US President who came from the city, wants to restore a centrist true republic. Finally, the Diversity League is a coalition of black and Hispanic groups from the grungier parts of the city, fed up with the blinding snow-whiteness of every other local faction.
Lansing (Lassey)
Lansing was capital of the old state of Michigan. Now it is the crumbling heart of the city-state which claims to be the true government of the entire former state, the New Michigan Dominion. The Dominion is a right-wing conservative dream, in keeping with the views of its founders, and a nightmare for anyone who isn't white, male, straight, and rich. On the borders of Dominion territory, the place once known as "East Lansing" is now the hotbed of dissent, through a patriot group based on college sports calling itself the Spartan Legion. Technologically, Lansing is very backwards and relies on scavenging to provide the equipment to maintain its buildings and economy.
Ann Arbor (Narber)
The apocalypse proved to the denizens of Ann Arbor just how unstable the college-town system truly is. The city is now divided by the Thompson Street Wall due to the Great Town-Gown Truce of 2025. Within the wall the Most Serene and Holy University of Michigan attempts to rule with dictatorial authority over several thousand "students" (i.e. subjects), though the students have put up strong resistance through groups like the Students for a Democratic Society (better known as the Pot-Smoking College Hippies) and the Students for Demonocratic Satanism, hell-bent (no pun intended) on summoning their dark lord to oust God-Empress Coleman from her throne. Outside, the People's Republic of Ann Arbor is a similarly authoritarian communist state, which has socialized farms throughout the countryside around the city.
Detroit (Troy)
Detroit is, in fact, the least damaged of all cities by the apocalypse, because it couldn't really have gotten any worse. Like Lansing, it is ruled by a fascist dictatorship left over from the pre-apocalypse government, centered around a Big Brother-like figure called the Emergency Manager. They have nationalized most of the city's famous factories, using them to produce weapons to outfit their Nazi-esque army, intent on invading Canada to the east for the Lebensraum. Below 8 Mile Road, the Emergency Manager's forces must deal with constant resistance from the 8 Mile N***az, a coalition of former-enemy street gangs who want independence. In the affluent white suburbs, the Hockey Resistance Army also violently opposes the Emergency Manager, due to his seizure of their five-bedroom houses and artificial-lakefront condos to quarter troops and plant more crops in the lots. Those factories which resisted nationalization generally believe in a cult known as the "Church of Ford", inspired by Aldous Huxley's Brave New World, which believes in enlightenment through the application of assembly lines for every conceivable problem.
Presumably these will mostly be funny to Michigan folks, though the analyses of poor urban areas and college towns are probably universal.