Plainly, Emhoff shines in some ways Harris doesn’t — which reflects his own innate political touch, the kind of instinctive connection that even some Harris supporters worry she doesn’t show. “He is just a very approachable, normal guy who, within the span of a decade, went from going on a blind date with the California attorney general, to, literally less than 10 years later, flying out on an Air Force jet representing our country at Auschwitz,” says Brian Brokaw, a longtime California Democratic strategist who knows both of them well. “He’s a trailblazer in his own way, one that I...