That's a good article, even if a bit douchy. But he's fundamentally correct, the Left is now locked into a fight that is going to occupy itself with for at least a decade or two, unless a financial collapse happens and then the conversation will get a lot shorter. I don't know that we're going to build up a new party (If we do, the Green party seems the most likely candidate, since it at least has some history, financial backing, and so forth). But if ActBlue decides to only work for Green candidates... That would be a serious, serious start in the battle. But this is a conversation that's going to happen until after November, and then the Progressive Left is going lodge everything it's got at Hillary. I'd be shocked if Hillary didn't become the most hated president in US history once we're done with her after her first term.
...
Well,
China's economy just went tits up for second time three months ago. I'm pretty certain that this is the start of it. You never know precisely when it's going to break, but it will break. Given that it's happened about once every ten years with increasing severity? Yes, I think it being within the next 4 years is a pretty solid bet, even if it's not certain.
It'll be the final straw because the first economic recession was itself practically the breaking point for neoliberal politics. It's impossible to argue that Sanders and Trump aren't 100% caused by the financial collapse.