Just days away from the first contest of the 2020 Democratic presidential primary, most of the leading candidates are making electability a cornerstone of their final pitches. And its easy to see why: For months, Democratic voters have made it evident in the polls that theyre particularly focused on taking down President Donald Trump .

Former Vice President Joe Biden is running ads in Iowa showing the results of head-to-head polls that pit him against Trump. Former South Bend, Indiana, Mayor Pete Buttigiegs commercials include an Iowa state senator praising him as the one most capable of winning the general election. Massachusetts Sen. Elizabeth Warren , whose campaign previously emphasized her policy chops, is now running a spot with the title Why She Will Beat Him. Vermont Sen. Bernie Sanders has placed less emphasis on electability ahead of the Iowa caucuses, but its an issue his campaign has touted in the past .

Both voters and candidates have made it clear that electability matters. But the precise role that the subject plays in voters decision-making is less cut and dried, as new HuffPost/YouGov polling shows.