John D. Miller had a hand in creating "The Apprentice," the show that supercharged former President Trump’s popularity, and he now laments being involved. Miller, who was the former chair of the NBCUniversal Marketing Council and chief marketing officer for NBC and NBCUniversal, wrote a mournful mea culpa for U.S. News headlined, "We Created a Monster: Trump Was a TV Fantasy Invented for 'The Apprentice.'" "I want to apologize to America," he began. "I helped create a monster," recalling how he...