The universal rule for socialists and various other despots is gun confiscation precedes Democide (death by government).
Red flag laws, gun registration/confiscation in blue states appears to be the most likely trigger. Yes, many leftists think they want a leftist totalitarian dictatorship. But, most of these leftists, that is the dumbed down base, are losers and cowards. They think the whole thing is a video game or some fulfillment of a socialist textbook utopia.
Sheriffs will be the key here. Then Governors because they control the national guard.
It is the fracture of the military which creates the real bloodbath and destruction.
Democide: Socialism, Tyranny, Guns and Freedom
(Why the 2A is paramount)
5 minute video
https://www.youtube.com/watch?v=6T9NvIJCFzQ