Tory backbenchers are not convinced by the enormous election triumph, which might just about have got our next unelected (so far) but soon to be (maybe) next Prime Minister into Downing Street - and the leadership fears that there would be moves against him if he can not become Prime Minister in the next couple of days.
One Tory MP told The Guardian's Nick Watt.
I do not buy the argument that we have done well by adding more than 90 seats. We were starting from such a low base. A muppet could have put 4% on Michael Howard's share of the vote. We have all been so disciplined. They have been all over the place on the economy. We kept quiet because they said we know how to win.
They said the California-isation of the party and the modernisation of the party is the way to win. It's all complete crap.
If you can identify which of the muppets would do best as Tory leader, or could take over from Chris Grayling or other shadow cabinet members, please shout.
Cameron will probably make it to PM and avoid his head ending up on a spike - for now.
Much of this was predicted a fortnight before polling day in a rather uncannily accurate description of the last few days from Ben Brogan:
If the Tory leader is not prime minister on or soon after May 7, the parliamentary party will turn on its leader. Already the 92 Group, a club of Thatcherite MPs, is planning a meeting in the week after the election that could demand Mr Osborne's head. A coalition of the excluded, the irreconcilables, and those nursing grievances over the handling of the expenses inquiry is preparing to break its silence. Up to 20 MPs are said to be ready to speak out.