At first glance, Democrats’ fixation on electability would seem to give them an advantage in the midterms. The only problem is that there is little evidence that primary voters are particularly good at determining which candidate is most electable. What makes a candidate electable? In Maine, Graham Platner won the Democratic Senate primary by arguing that his populist politics and outsider status could win over voters who had soured on conventional politicians. But he later bowed out of the race after an allegation of sexual assault turned the electability argument against him.