Trump will have to deal with Nancy Pelosi for at least another 2 years. Clearly that will mean continued investigations against him, his family, and his supporters along with virtually nothing getting done in Congress for just those 2 years. The media (which I include social media) will continue spurning Trump as they've been doing for years. Antifa/BLM will raise their ugly heads again with renewed ferocity. In short, it will just be another miserable slog for at least 2 more years if not 4. Why not bow out after if he can secure a victory for himself and Pence? It would still be one last FU to the Left, and he could manage to heal some of the rifts in the country if he did so.
It's a bold move. The Putin Castle! He becomes "VP" and Pence becomes "POTUS" but they both agree privately that nothing has changed, rather like Putin and Medvedev swapped between President and Prime Minister.
Pence could be portrayed as 'more liberal than his predecessor' to the uneducated masses.
https://en.wikipedia.org/wiki/Putin-Medvedev_tandemocracy
https://en.wikipedia.org/wiki/Castling
It's like conservatives hate to be optimistic or something.
I think it's a religious thing. Religious people don't believe in the perfectability of man or utopias. Leftists believe in both. If you're a conservative you know man is flawed, and the best you can hope for is holding leftists attempts to create a utopia, which always end in dystopia, for another generation.
It's almost Doystoyevskian. Which is ironic as the Cold War was basically US Conservatives against hard drinking, gloomy Russians. This guy is post Cold War but does he look cheerful?

Russian Defense Minister Sergei Shoigu
And then on the conservative side, all the ads on Gorka's show are shilling diabeetus medicine, support socks and pain-relieving snake oils.
Like is short and grim, but then we might go to heaven. We'll get there sooner if the balloon goes up and leftists attempts at utopia will be stopped until intelligent life reemerges from slime, so there's that. The only real difference is that the Russians like vodka and the Americans like whiskey. Either way, liver will rot and diabeetus will set in. The existing political order will be protected with violence if necessary. In fact, we're salivating over that prospect.
Look at Shoigu. Does he look like someone who'd back away from a fight? The fucker is straining at the leash for one. Better to die gloriously in a thermonuclear fire than slowly from massive organ failure. I honestly get the same impression from American conservatives and it is endearing.