Meghan Markle was a “narcissistic sociopath” who was plotting her royal exit from the outset, her former staff contended in a bombshell new book. Sources told author Valentine Low, who wrote “Courtiers: The Hidden Power Behind the Crown,” that staff members coined the epithet for the Duchess of Sussex, according to a report in The Sun citing excepts from the explosive tome. The book details the alleged ugly behavior by Meghan and husband, Prince Harry, who quit their royal duties in 2020. “Everyone knew that the institution would be judged by her happiness. The mistake they made was thinking that...