I think I've already predicted a scenario where it's highly likely the Democratic Party will further alienate it's left and may lead to a split.

That's not so much a prediction as a hope for an eventual split so you can jump on the third party bandwagon.

The way things are actually looking is that lefties are getting elected by voters all over the place because demographics are trending leftward. The Democratic Party has not really begun to adjust yet but they will. Not enough to satisfy you, but enough to prevent an actual split. The socialization of capitalism is a slow and unsteady work in progress.
Good coffee, good weed, and time on my hands...