We don't even have to go that far to realize how quickly the democratic establishment would roll over in the face of a civil war. I don't think Chuck Schumer is going to be leading an armed resistance movement anytime soon.
Change my mind, but everyone's assumption that the Senate Minority Leader, of all people, is the de facto head of the democrats and would "lead" the opposition in a civil war is asinine – whether it's Chuck Schumer or whoever replaces him.