NakedCapitalism asks the obvious question:
Sanders won the CNN focus group, the Fusion focus group, and the Fox News focus group; in the latter, he even converted several Hillary supporters. He won the Slate online poll, CNN/Time online poll, 9News Colorado, The Street online poll, Fox5 poll, the conservative Drudge online poll and the liberal Daily Kos online poll. There wasn’t, to this writer’s knowledge, a poll he didn’t win by at least an 18-point margin. But you wouldn’t know this from reading the establishment press. The New York Times, the New Yorker, CNN, Politico, Slate, New York Magazine, and Vox all unanimously say Hillary Clinton cleaned house. What gives?
As far as I can tell there was no scientific polling done of “who won” which is very odd given that there were such polls after the GOP debates. All the above are unscientific polls. But so too is the poll of pundits.