Downing Street is "losing patience" with Chief of Staff Morgan McSweeney after a source declared it was "shocking" that he left Sir Keir Starmer exposed.
It comes after Lord Peter Mandelson was sacked as Britain's Ambassador to the US when emails came to light showing him expressing support for convicted paedophile Jeffrey Epstein.
Mr McSweeney is becoming more exposed through a blame game over the loss of his mentor, Lord Mandelson, who he tried to keep in the position until the sacking, according to Guido Fawkes.
After Paul Ovenden's departure, an ally in No10 said support for Mr McSweeney is dwindling.
The Tories secured an urgent three-hour debate in the Commons this afternoon to discuss the Lord Mandelson issue.
A Downing Street source told Guido Fawkes that political staff worked "all weekend trying to piece together an acceptable timeline to excuse the inexcusable".
The source added that Mr McSweeney's "f**k-up is now causing untold damage".
Mr Starmer has said that if he knew what has since been revealed about Lord Mandelson's relationship with Epstein, he would never have appointed him as Ambassador.
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Downing Street is 'losing patience' with Chief of Staff Morgan McSweeney after a source declared it was 'shocking' that he left Sir Keir Starmer exposed
| PAThe source said it was "shocking" that Mr McSweeney left the Prime Minister exposed and "a lot of us are losing patience with him".
Questions about Sir Keir Starmer's leadership have emerged from Labour MPs following his decision to dismiss Lord Mandelson.
The Prime Minister faces criticism from both public statements and private briefings by Labour MPs regarding his leadership approach.
This internal dissent comes as Starmer prepares for Donald Trump's state visit this week.
Lord Mandelson has been removed as Britain's Ambassador to the US | GETTYThe timing has amplified concerns, with MPs voicing dissatisfaction about the prime minister's decision-making and the broader functioning of his Downing Street team.
Labour backbencher Richard Burgon has suggested the Prime Minister's position could become untenable following poor electoral results in May.
The controversy surrounding Mandelson's removal has coincided with Angela Rayner's recent departure from her role as Deputy Prime Minister, creating a pattern that has emboldened critics within Labour's parliamentary ranks.
These successive setbacks have prompted MPs to voice concerns more openly about the Prime Minister's judgement.
Mr McSweeney is becoming more exposed through a blame game over the loss of his mentor
| PAThe weekend saw extensive briefing activity from Labour MPs, both publicly and privately, challenging Sir Keir's leadership capabilities.
This marks a significant escalation in internal party tensions, with MPs becoming increasingly willing to express their frustrations about the current administration's direction.
The discontent reflects broader anxieties about the government's standing despite Labour having replaced the Conservatives relatively recently.