Perhaps what Democrats really want is a presidential temperament He’s the least qualified of the top-tier Democratic presidential candidates, and the one who most clearly lacks a compelling reason for running. Yet Pete Buttigieg has somehow maintained his hold on fourth place in the 2020 nomination contest while other more heralded candidates have faded or folded altogether. And now that he has surged to the top of the polls in Iowa, it may be time to start taking his unlikely campaign seriously — and asking what exactly it is about the mild-mannered mayor of South Bend, Ind., that has endeared...