His working day started with a row among his top ministers around the Cabinet table.
And after a febrile day of plotting among mutinous Red Wall MPs, it only got worse for Boris Johnson.
The PM is said to have backed controversial plans to scrap the TV licence after Work and Pensions Secretary Therese Coffey complained about the unexpected announcement by Culture Secretary Nadine Dorries that the fee was being frozen.
Chancellor Rishi Sunak is also believed to have been irritated that he and others only found out at short notice about Monday's attack on the BBC, launched as part of a plan for new populist policies dubbed Operation Red Meat.
But as well as leaving several in the Cabinet put out, the move also failed in its main objective of winning over restive Tory backbenchers.
By yesterday, most had returned to Westminster with their ears ringing from complaints levelled at the PM by their angry constituents.
And although many Tory MPs owe their positions to the landslide 2019 general election victory, the figure they saw on loop on their TVs and mobile phone screens all afternoon looked under renewed pressure.
Interviewed by Sky News about the never-ending stream of allegations of illegal parties and subsequent cover-ups, Mr Johnson appeared emotional.
Boris Johnson, pictured, last night faced off a so-called 'Pork Pie Plot' to unseat the Prime Minister by newly-elected and Red Wall Tory MPs
Dominic Cummings (left) suggested in a post on his Substack blog on Monday, that worse might still be to come for No10
He addressed the controversy over the May 20, 2020 party, saying: 'If I had my time again, I would not have allowed things to develop in that way.
'Nobody told me that what we were doing was against the rules, that the event in question was something that... was not a work event.'
He added: 'Nobody told me this is an event that is against the rules, that is in breach of what we're asking everybody else to do, it should not go ahead.'
His comments were contradicted in the latest blog by Dominic Cummings, the PM's former chief adviser, whose priority now appears to be bringing down his former boss.
Mr Cummings wrote: 'The events of 20 May alone, never mind the string of other events, mean the PM lied to parliament about parties.'
While Mr Johnson repeated his humble and sincere apologies, his defence that 'no one warned him' provoked anger.
As his interview at a hospital in Finchley, north London was being broadcast, a group of '2019-ers' were holding an emergency meeting to discuss another No10 leaving do – that of the PM himself.