UK Prime Minister Keir Starmer is facing increasing pressure to resign as the fallout from the appointment of Peter Mandelson as ambassador to the US continues to escalate. The recent revelation that Mandelson failed security vetting has left Starmer in a precarious position, leading to accusations that he was kept in the dark regarding the vetting failures. Allies and critics alike are questioning his leadership, with some former officials stating that civil servants had known about Mandelson’s vetting issues weeks before the appointment. Amid this turmoil, Starmer has asserted his ignorance of the situation, expressing frustration over how the vetting process was handled. Meanwhile, calls for his resignation grow stronger as critics leverage the scandal to challenge his credibility and effectiveness as a leader.