Democratic Primaries

If trump is the loser, how will he react, vindictive petty little putz that he has proved himself to be.

Probably will try to trash the place. Loot the White House of some choice historical antiques. enact all kinds of poison pills and other things to trip up and screw over the Democrat who replaces him (presumably Biden), tie the election results up in court, and bribe Gorsuch and Kavanaugh to rule in his favor to have the results nullified, AND worse.

What strings will he try to pull?

What will he try to block - maybe permanently?

What get-arounds will he attempt?

And how sneaky will all that be? 'Cuz he's a sneaky little shit, too, and he doesn't heed any limits or guardrails on his "power". He's already declared that the job he cheated his way into in 2016 allows him to do whatever he wants. And NOBODY is attempting to rein him in (beyond the Dems impeaching his ass). His toadies on the other side of the aisle didn't do squat to stop him when they had the chance, and unfortunately can't be relied upon even to start thinking about such things.