I hope the progressive caucus does push the party to the left

And I think we're poised to see exactly that. I don't think it can even be avoided.The Green New Deal is brand new, give it some time to mature, Monsieur Firebrand, before calling for a pound of flesh from the wiley old politicians who know how to get things done.
Exciting times are coming after the dark Trump years are done.
Good coffee, good weed, and time on my hands...