If Trump wins in a landslide, or at least by a comfortable margin, he’s in.
Democratic voters will take to the streets (they should), but it won’t change the outcome. There will be hell to pay afterward — the country may well come apart — but that’s a different story. (There will be hell to pay after this election no matter who wins it.)
If Biden wins in a landslide, he’s in and nothing can unseat him.
The Boogaloo Boys may take to the streets, and if so, the cops will coddle them. But if protest turns into a battle between Boogaloos and Biden supporters, the state will eventually shut the whole thing down and let it die off, as it did with the left-inspired George Floyd protests.
If Trump wins narrowly — by less than the number of disqualified ballots, for example
there will be disruption for a while, but then it will go to the courts, probably a whole series of them, state and federal. Public life will be messy and uncomfortable for a while and people will take to the streets.
But when the courts decide the outcome, it will be over. Someone, most likely not Trump, will be president, though a Trump win is possible.
Keep in mind, Trump is not the candidate of the oligarchy, of the small clutch of people who actually run the country. Biden is.
So Biden has the edge. If the presidency can be handed to Biden it will be. If it has to be handed to Trump, it will be, but not because the Boogaloos and their fascist cop friends let the streets run red with anger. It will be handed to Trump because Trump’s case is too strong to overturn, even for the oligarchs.