Her supporters tend to be moderate and college educated — precisely the type of voters who have helped decide recent presidential races. We spoke with nearly 40 to see where they’re leaning.

Roughly half of those interviewed, including Ms. Gilman, said that in a Biden-Trump matchup, they would side with the Republican, while expressing varying degrees of discomfort. That number would almost certainly be higher in the actual results of the general election, after Americans have retreated further into partisan corners.