For the plotters on all sides, there's a very complex calculation involved.
On the one hand, Boris is likely to bide his time and wait until Brexit is done. Too much like hard work for Boris. Also, he's sad things he might not be able to deliver on and he'd probably rather not have to do that. But those who don't want Boris sense a bit of an opportunity. Boris's stock is low at the moment - a lot of gaffes and disloyalty. He's part of the problem, not the solution. So if May goes quickly, yup, someone will have to Do Brexit, but it may be the only way to fend off Boris.
(Of course, that's pretty much what Theresa May thought and look where it has got her. Broken on the rocks and with the Great White Shark circling her.)
The crucial question for May is not whether Boris Johnson and Grant Shapps think she should quit. Of course they do. Goes without saying. But if the sickness is spreading throughout the wider party and the donors, she's in real trouble. From yesterday's guardian, a comment from Tory donor Charlie Mullins:
Charlie Mullins, the founder of London-based Pimlico Plumbers, said May must leave because she was being bullied and undermined by Johnson.(Am I the only one struck by the profound oddness of the soultion - the victim has to go, rather than the bullies?)
He said: “She has got to go for her own sake. It is getting embarrassing. If this was a boxing match, the fight would have been stopped. She has been put in a position where she is being bullied, she is being intimidated, they are making her life hell. These are Conservative people who are destroying this woman and it needs to stop.”
So that must be worrying for her. These people aren't likely to throw money at a party they regard as doomed.
Even if May survives in the short term - and I think she will, more due to the lack of spine in the Conservative party as a whole, rather than her own reserves of courage or obstinacy - she's in a pretty grim position. The Tory papers are against her, and every misstep will be blown up as a fresh crisis which raises new questions about her leadership. Believe me, on this topic if nothing else, we lefties know of what we speak. You think May is having a rough time of it? Look at Corbyn's leadership up until June 2017 ...
It's likely May's premiership will be remembered as a slightly surreal interlude between Cameron's blustering incompetence and ... well, whatever comes next. It is unlikely she can expect historical rehabilitation as Gordon Brown can anticipate. So all that's left is the halcyon days early on. Cast your mind back to her first PMQs, and recall her imitation of Margaret Thatcher - "Remind him of anybody?"
Yes, Theresa, you DO remind us of Margaret Thatcher now. The broken, post Poll Tax, post-Howe version, waiting for the unsmiling, bland little men in the background to tell her it was all up. Six months ago you were unassailable and riding towards a triumph; now you're just waiting to be put out of your misery.
"It's a funny old world," Thatcher said, after announcing her resignation to her Cabinet. I bet you agree.