In the minds of liberals, Trump has always been illegitimate (because he's icky n stuff) and now it's more of a question of "will he just leave or do we have to do this the hard way?"
Unfortunately for them, the United States military might have something to say about all of it. It will be a constitutional crisis in which the military will be the only way of restoring order. We were told years ago, now we just have to dodge the incoming fallout to the best of our abilities.