British Prime Minister Keir Starmer acknowledges he made a mistake appointing Peter Mandelson as U.K. ambassador to Washington. He says he was unaware Mandelson failed security checks. On Monday, Starmer faced calls in the House in Commons to resign but blamed Foreign Office officials for not informing him. Mandelson was fired in September after details emerged about his friendship with Jeffrey Epstein. Starmer insists he wouldn’t have appointed Mandelson if he had known. Critics argue Starmer's judgment is flawed, pointing to his struggles with economic growth and public services. Mandelson is under investigation for misconduct but denies wrongdoing.