“In another instance, a former staffer told me about how Horowitz, who served as editor in chief of the site until mid-2015 and is now editor at large, once interrupted a reporter pitching a video about a woman building rooftop gardens in New Orleans: “‘But, is she black? Is she black?’" the former staffer recalled Horowitz asking, “as if the story would be less impactful had the woman doing the work been white or Hispanic or Martian.'”