Bernie's entire model of Presidential power is marshaling an unprecedented wave of citizens in the streets to march, demanding these policies, and engage in a massive, prolonged siege against the establishment political status quo. It's a long shot in the best of circumstances, he absolutely cannot afford to write off the 3rd most populous state in the nation. I think twitter bubbles have warped a lot of leftist's perspectives about how self-evidently popular the agenda is. Not saying he can't stake out politically difficult positions, just don't think he can afford to be so flippant about the unbaptized.