With the Iowa caucus just four days away, the Democratic presidential candidates are making a last-ditch appeal to “future former Republican voters,” as Pete Buttigieg described them. These are the voters still on the fence, the centrists that could be swayed by the right candidate.

As November approaches, these voters will become even more important, and so will electability. Yet the one Democratic candidate seemingly unconcerned with the issue of electability is the same candidate currently surging in the polls: Bernie Sanders.