So here is what I think will happen.
Midterms:
Dumpy will make a half-assed attempt at stealing them. In red states, there will be instances of Republicans destroying or "losing" ballots. A few elections will be flipped by their fraud. I can even see them stealing the TX Senate seat. In blue states, nothing will happen that changes any outcomes, although Dump will posture about sending jackboot thugs to "monitor" polling. Every move the Nazis make to intimidate voters will provoke a backlash.
The Dems will take the House by a decent margin. There will be some shenanigans from the GOP about not seating new Dems for REASONS, but the lower federal courts will dismiss all that as nonsense. There's no real operative shovel handle to even get the SCOTUS involved if they wanted. The Senate will stay GOP.
2028:
Assume Dump is still not dead because the worst people seem to hang on the longest. The GOP candidates will line up to kiss the ring. The Iran war and the Strait closure will be over 2.5 years long now. New Reality prices will be baked in at every point in the supply chain, and all global economies will be in near recession while the hopium .01% are still dancing at Gatsby's mansion. Other countries will already be showing a wide far left vs far right cleavage. An actual true left, or as close to one as the US has ever had, will be in full swing as a co-tenancy of the Dem national party. Assuming the Dems do not make the mistake of nominating a Newsom or Harris, they will sweep both branches and the White House.
And then we'll see what they do.
In the middle term, of course, we still have brown shirts in the streets pulling immigrants out of their homes, splitting families, abusing and I assume given Republicans' track record raping vulnerable people, and reminding everyone why we fought WW2 and why pundits from Lindbergh to Tucker are enabling evil when they attack tolerance and diversity.
Scorecard: No canceled election. No Civil War. No nuclear annihilation. But another horrific two years of interment camps, state violence against citizens and non-citizens, widespread corruption and theft of public resources by Republicans at every level down to judges, and just generally the type of regime you expect from a banana republic.
Whether we do anything to punish them and claw back all the theft since 1981 once we take back power is The Question. I'm not hopeful, given we have never had the cojones to do it before, but the rotten gasbag diaper show will be that much older, slower, and more demented and unhygenic for everyone with eyes to see.
The worst swing into authoritarianism in US history, absolutely. But the fight back goes on every day, and the more the Nazis succeed the smaller and smaller the circle of beneficiaries of their crimes gets and the larger and larger the massive majority against them gets.