Since before his first term, President Trump has told his best assistants to approach every day as if it is an episode of a TV program -a concept that he understands well, based on tactics from his time as a reality TV star. A member of the administration that seems to excel at this is Kristi Noom, who has transformed her social media pages into a short reality show. James Poniewozik, the most important TV critic at The Times, explains.