One of the arguments Bernie Sanders' fans made during the 2016 Democratic primary was that he was more electable than Hillary Clinton. His favorable ratings with the general electorate were far higher than Hillary Clinton's. Indeed, Sanders maintained fairly high favorable ratings with all voters as late as 2018.

Sanders' popularity among all voters seems to be declining considerably in the last few months, however.

Our new CNN poll puts Sanders favorable rating at 46% compared to an unfavorable rating of 45% among registered voters. This is only the latest poll to have Sanders at basically even in his net favorability rating (favorable-unfavorable). A Quinnipiac University poll from late December gave the Vermont senator a net favorability of just +2 points. An average of all recent polls put Sanders' net favorability at about -1 points.