God help the Democrats if Biden dies during his first term. It will be a blood bath after how close this election was despite everything that had gone wrong this year for Trump.
I would be pretty shocked if Trump ran.
But I'd be more shocked if he didn't spend the next 4 years mouthing off & sewing discontent & pissing about as though he were running. Making a big stink, and pulling in millions of millions of dollars.
I'm not sure how much money Trump made from the last election in merchandising but it wouldn't have been a small number.
We haven't quite entered the era where politics is used to sell action figures, but we're not far off.
If I were the Dems I'd have Giuliani on retainer and ready to go.
To quote Don Draper from Mad Men (s02e05): "[The dispute/non-concession] never happened. It will shock you how much it never happened."