Barbara Boxer, the senator from California, leaned over her press secretary, Peter True, as he sat at an HP desktop computer and tried to find an old campaign ad from 2010. Boxer wanted me to see the ad because it featured interviews with former employees of HP who had been laid off by the storied technology company’s one-time CEO, Carly Fiorina, who in 2010 challenged Boxer for her seat and now, five years later, seeks the Republican nomination for a somewhat higher office: president of the United States. -snip- Fiorina was, in Boxer’s telling, a monstrously greedy businesswoman who would...