Keir Starmer Faces Leadership Crisis Following Top Advisor’s Resignation Over Mandelson Appointment
After days of mounting pressure stemming from a controversial appointment, UK Prime Minister Keir Starmer is battling to regain control of his party following the resignation of his chief of staff, Morgan McSweeney. The departure, announced Sunday, comes amid widespread anger over Starmer’s decision to appoint Peter Mandelson as the US ambassador despite Mandelson’s well-documented ties to convicted sex offender Jeffrey Epstein.
McSweeney, in a statement released Sunday, accepted “full responsibility” for advising Starmer to proceed with the appointment, acknowledging that the decision had eroded trust in both the Labour party and the broader political landscape. The fallout underscores a deepening crisis for Starmer, who now faces questions about his judgment and leadership.
The resignation of one of the most influential and often divisive figures in recent Labour history is seen by some within the party as a potential opportunity to quell internal dissent and ward off challenges to Starmer’s authority. However, many observers believe the loss of McSweeney – widely regarded as the architect of Starmer’s ascent – represents a significant blow to the Prime Minister’s operation. The focus is now squarely back on Starmer’s rationale for selecting Mandelson for the high-profile diplomatic post.
According to senior Labour sources, McSweeney’s exit has left Starmer “dangerously exposed” as he prepares to navigate a series of critical policy and electoral hurdles, including an upcoming byelection in Gorton and Denton. “Keir has just lost his firewall, on Mandelson and a whole load of other issues. Where does he think the anger gets directed next?” a source close to Downing Street stated.
The situation is so precarious that one MP bluntly assessed Starmer’s position, saying, “The buck ultimately stops with the PM. All this has done has bought him a little more time but he’s mortally wounded and it’s not if, it’s when he goes.”
Adding to the pressure, senior government figures anticipate the imminent release of hundreds of thousands of documents – including private WhatsApp messages and emails – detailing communications between Mandelson, No. 10 officials, and ministers during his time in Washington. A well-placed source revealed that these documents are expected to demonstrate that the Cabinet Office’s propriety and ethics team had explicitly warned of the “serious reputational risk” associated with Mandelson’s appointment, given his publicly known association with Epstein.
Starmer had increasingly relied on McSweeney’s political judgment, often prioritizing it over his own counsel, despite consistent criticism directed at No. 10. The pair engaged in multiple conversations over the past few days regarding McSweeney’s future, ultimately reaching an agreement on Sunday for his resignation.
Political opponents and figures within the Labour party have accused Starmer of allowing McSweeney to take the blame for a decision that ultimately rested with his own judgment. Allies of McSweeney, however, maintain that he merely offered advice, stating, “He gave his advice, but that’s all it was. Keir made the decision.”
In his resignation statement, McSweeney emphasized the need for a “fundamental overhaul” of the vetting process for appointments, stating, “The decision to appoint Peter Mandelson was wrong. He has damaged our party, our country and trust in politics itself…This cannot simply be a gesture but a safeguard for the future.”
Downing Street staff were informed Sunday evening that Jill Cuthbertson and Vidhya Alakeson, McSweeney’s deputies, would immediately assume the responsibilities of acting chiefs of staff.
Since Labour assumed power, McSweeney had become a focal point of discontent among some backbenchers and grassroots members, who expressed discomfort with his approach and the direction of the party on issues such as immigration and welfare cuts. “It’s about time. McSweeney was behind a string of terrible decisions because he cannot behave anything other than factionally. The PM needs to grip this and bring in a much wider range of voices than those he’s listened to up to now,” a senior MP commented.
Criticism of the No. 10 operation extended from several prominent Labour politicians over the weekend. Former Prime Minister Gordon Brown acknowledged Starmer’s integrity but noted he had been “slow to do the right things.” David Blunkett described the situation as “dire” for Starmer and called for McSweeney’s removal, while also cautioning against internal power struggles among allies of Angela Rayner and Wes Streeting. “When people see a party acting like ferrets in a sack they draw their conclusions,” Blunkett warned.
Concerns were also raised about Starmer’s overall leadership capabilities. One former New Labour cabinet minister expressed skepticism, stating, “Although there may be some satisfaction at Morgan’s resignation, my concern is the problem is Keir, not his advisers.”
Friends of McSweeney indicated he plans to take a temporary step back from politics, though they believe he will likely re-engage in the future. “Morgan has been doing this for 25 years, I’m sure he’ll get more involved again in future, but not right now,” one confidant shared.
McSweeney concluded his statement by reaffirming his commitment to public service: “This has not been an easy decision…I leave with pride in all we have achieved mixed with regret at the circumstances of my departure. But I have always believed there are moments when you must accept your responsibility and step aside for the bigger cause.”
Starmer, in response, expressed his gratitude to McSweeney, acknowledging his pivotal role in the party’s turnaround and recent electoral success. “He turned our party around after one of its worst ever defeats and played a central role running our election campaign. It is largely thanks to his dedication, loyalty and leadership that we won a landslide majority and have the chance to change the country,” Starmer stated.
Notably, Starmer had publicly expressed confidence in McSweeney as recently as Thursday. McSweeney’s resignation marks the second departure of a Downing Street chief of staff, following Sue Gray’s exit in 2024, and represents the latest in a series of staff departures from No. 10 in recent months.
Conservative leader Kemi Badenoch seized on the opportunity to criticize Starmer, stating, “It’s about time. But once again with this PM it’s somebody else’s fault: ‘Mandelson lied to me’ or ‘Morgan advised me’. Keir Starmer has to take responsibility for his own terrible decisions. But he never does.”
