Pat McFadden, Yvette Cooper and Ed Miliband have all gone cold on him this week. Apparently, Wes Streeting and Shabana Mahmood are not impressed. So he's likely lost the Cabinet.
Things are going to get worse for him next week because Philip Barton, the Permanent Secretary who preceded Olly Robbins and left his post early, during the time Mandelson was being appointed, is giving evidence to the Foreign Affairs Select Committee on Tuesday. Then Ian Collard, head of security at the Foreign Office. Then Morgan McSweeney. Barton has nothing to lose, just like Robbins. All of this will reinforce Starmer's poor judgement and a shambolic, macho number 10.
Then there's the three Ukrainian rent boy arson trial starting, which inflaming some of the wilder ideas flying about on Starmer's 'extra curricular' activities.
Also brewing is more dirt on Richard Hermer, making money out of creating a case against British military in Iraq. Another Starmer appointment, showved into the Lords so he could be appointed Attorney General.
If Labour acts sensibly, a change doesn't have to be chaotic or swift. They could agree he stays until the party conference, find a seat for Andy Burnham, and conduct the campaign over the Summer.