Yes, yes I know we’re already kind of there, but I mean without the current infighting and clash between finance vampires and industrial vampires and other gridlock factors. 
Fascism burns itself out fast with the constant need to purge and loot until nothing is left, so I know even 20 years of unmitigated fascism is a stretch. Still, what do you think a “they get absolutely everything they want, fire all US government employees and replace them at the low echelon with Billy Bob, the middle echelon with James Holden Bloodfeast III, and their favorite Youtubers at the top echelon” complete and total MAGA victory might look like? 
Try to hold it together and stretch your sense of disbelief that the hogs get the feed they’ve been squealing for, from mere reappropriated resources (the way nazis murdered and looted and redistributed to their favorite failfamilies) or even something surreal like the incel supporters actually getting government issued slaves while destroying all other safety nets entirely, if you dare. After all, Dr. Professor Lobster Esquire PhD MD says that’s the price of civilization, bucko. 
Let’s be generous and assume no outright nuclear war, just so there’s something to actually visualize other than a more actually historically accurate version of the Fallouterino treats. 
Company towns but they’re all basically private prisons held by different corporations. You can apply for transfer between them, but there’s no commons or society outside of them for the proles. Neoliberalism’s psychological prison is just way too effective to just lock everyone up in cages, but the frills we have now will go away and freedom to dilly dally will be largely restricted as climate change makes interstate borders in the US much more relevant. I say this a lot nowadays but I recommend reading The Grapes of Wrath and Parable of the Sower.
I double this recommendation highly as a former educator.
If you want a lighter version that’s still one hell of a read if a shorter one, check out In Dubious Battle by the same author.