538 Bulletpoint by Nate Silver: Is Electability A Self-Fulfilling Prophecy?

"A recent Avalanche Strategy poll found Joe Biden in the lead, but when voters were asked to “imagine that they have a magic wand and can make any of the candidates president,” Elizabeth Warren narrowly became the top choice. Being a woman was the biggest barrier to electability, based on Avalanche’s analysis of the results, and women were more likely to cite gender as a factor than men."