Peter Mandelson, the former British ambassador to the U.S., was arrested on suspicion of misconduct in public office on Monday amid an investigation sparked by the release of the Epstein files. The big picture: Mandelson is one of several prominent figures whose careers have been derailed amid the global reckoning for those tied to convicted sex offender Jeffrey Epstein.Mandelson was removed from his post last September by U.K. Prime Minister Keir Starmer after the release of Epstein's so-calle...