If it needs to be put into the SDMB cliche of “put a fork in him” then fine. I know that some, including some of his supporters, always had the fork in him as far as getting the nomination went. Some of us concluded the fork could be placed after Nevada. Some won’t believe the fork can be placed while the numbers are such that he could still win so long as he gets every single remaining delegate or until he has suspended his campaign. It’s not over until that final buzzer blares! Fine.
Yes, MfM, I have seen 538’s previous and newer list of his state targets to even be hitting 50/50 given demographics. That he has performed below those metrics in each state so far. Which paints a pretty pessimistic picture. And that according to 538 there is not a single state with polling data in which he is not currently behind those metrics, sometimes quite significantly. By those demographics he should fairly easily sweep the lot of Minnesota, Colorado, Massachusetts, and Oklahoma. By that metric failure to win all of them, sizably, would be most consistent that he is in fact nowhere near close to having the support of half of Democratic primary and caucus voters overall. He is advertising almost exclusively in those states and pretty much ceding the rest, and their delegates, to Clinton (where her team is spending money). In Colorado, demographic advantage him +11, he is outspending her more than two-fold.
So let’s for now leave off whether or not he is able to generate enough new funds to keep it up. Let’s for second leave the subject of whatever the delegate deficit becomes if he indeed loses delegate rich states like Texas, Georgia, and Virginia by significantly more than what the 50/50 national metric would predict. (And given that Clinton’s team is outspending Sanders in those states where she already is expected to win by a wide margin, yeah that delegate deficit is gonna be substantial.) Yes, it is true that the more he underperforms those 50/50 national metrics in those delegate rich states the greater he needs to overperform his 50/50 national metrics in the remaining states … but just place all that as neutral.
With all that as neutral, ignoring it all, the implication of being not able to hit the 50/50 metric in states that he outspends her in by wide margins is that he is forked, even if he were to still (relatively narrowly) win those states. Actually lose any of them? Pretty conclusive proof that his support is far below a majority of Democratic primary and caucus voters.
Now to me that is overwhelmingly obvious and putting that back together with other bits, the need for momentum to generate the buzz that funds a putatively emerging movement, the need to far outperform the 50/50 metrics once you go into a substantial hole, so on, well I remain curious about how much it would take those who feel he still has a realistic path to the nomination to accept that there is none left.
As for the claim that “If Bernie attains 40% of the vote, that would show significant (though not majority) support for hard-left policies (soft-left in a European context).” … nah. It shows that a sizable minority of Democratic voters are wanting to vote against what they perceive as status quo, and/or against the incrementalist approach. For some just as a symbolic protest. Add that to some who have always just hated all things Clinton actual issues be damned. Some who just find Bernie more likable or trust him more … In reality he is not all that “hard left” in positions as much as in rhetorical approach. He takes the tactic of “We need to move in these radical directions!” while the Obama/Clinton tactic is “This (the same direction) is not radical, it is where you, the center, actually want to be and we need to defend going in that direction from the radical forces of the far-right.”
Reports of him building a movement are greatly exaggerated; there has been no outpouring of new voters and established elected progressives are not rallying around him waving the banners of revolution. I hope he can bootstrap the attention and enthusiasm he has garnered into helping some down ticket races and help achieve the Congress that can implement change in the direction that we, more of the center, do want to go … which is the same general direction he wants to head in. And he has decreased the toxicity of the word “socialism” even if he actually means EU style “social democracy” - so he moved the Overton Window some.
I do wonder if you would accept the contrapositive MfM: would failure of Sanders to achieve 40% of the vote prove to you that there is no significant support for “hard-left” policies?