Lauren Tamaki This article was published online on April 7, 2021.Andrew Yang is in the Throgs Neck neighborhood of the Bronx, standing next to a lectern on an empty city street.He’s just resumed his campaign for New York City mayor after taking two weeks off to recover from COVID-19. The strain of the illness shows. He’s hard to hear through his two masks. He coughs occasionally. He seems tired, though his trademark egghead affability—think “that chemistry teacher the middle schoolers really like” or “the guy who you have to admit leads a good team-building exercise”—is on full display.