On his blog today Krugman identifies members of the Radical Chic as part of the Sanders fan club. He doesn't use that term but he does use one I've used to describe the RC - "pose."
The Truth About the Sanders Movement
Purists: A somewhat different strand in the movement, also familiar to those of us of a certain age, consists of those for whom political activism is less about achieving things and more about striking a personal pose. They are the pure, the unsullied, who reject the corruptions of this world and all those even slightly tainted – which means anyone who actually has gotten anything done. Quite a few Sanders surrogates were Naderites in 2000; the results of that venture don’t bother them, because it was never really about results, only about affirming personal identity.
Krugman references this very fine NYTimes article which says among other fascinating things:
Mr. Sanders did just nine points better, on average, among liberals than he did among moderates. By comparison, he did 11 points worse among women than among men, 18 points worse among nonwhites than among whites and 28 points worse among those who identified as Democrats than among independents.
It is very hard to point to differences between Mrs. Clinton and Mr. Sanders’s proposed policies that could plausibly account for such substantial cleavages. They are reflections of social identities, symbolic commitments and partisan loyalties.
Yet commentators who have been ready and willing to attribute Donald Trump’s success to anger, authoritarianism, or racism rather than policy issues have taken little note of the extent to which Mr. Sanders’s support is concentrated not among liberal ideologues but among disaffected white men.