Basically, the Dems have to pull off a landslide, winning both electoral college and popular vote to have a chance of spiking Trump’s guns. Anything less and MAGAts will claim the election is “stolen” - and has been said already, they have spent the last four years getting hand-picked Republicans into position in the likely key states to challenge results that do not favour Trump. Any challenge-able result means MAGA move to create chaos, leading to the pivot point where state forces (army, cops) are faced with the choice of which claim of legitimacy they back.
It is not like they have not been telegraphing their intentions…
We are surely past the point where we expect elections where the global new right/tech oligarchs are involved to be conducted in a civil fashion. Where we expect rationalism or openness to alternative viewpoints on the behalf of the conspira-zombie armies they have purposely been fashioning. The world is going to shit - the oligarchs have decided that their best chance of survival is to propagate fascist regimes. The US is just the biggest prize now they have Hungary, India, Italy, Turkey etc etc
The pressing need for those of us in Britain is/will be to build solidarity and resistance.