It has no chance of becoming a reality without the help of moderates and liberals who have made it very clear they would rather lose to MAGA than compromise with leftists and progressives.
People have yet to acknowledge the first implications of this. If we believe the numbers of progressives and leftists are growing there will come a time when we begin winning primaries but will lose general elections consistently because moderates and liberals suddenly won't "vote blue no matter who". Which means fascism isn't just a possibility, it's guaranteed.
If moderates and liberals don't make different choices there's nothing we can do.
I’ve sort of come to the conclusion that the spirit of the times has turned toward chaos and away from stability. These sorts of vague political commitments no longer have the power to avert the disaster we’re facing. We are fully in the grip of vast, impersonal historical forces again, and just have to see what happens.