There are many reasons why Gordon Brown won't resign before the General Election.
He's waited so long for the top job that now he's got it he can't bear let go so soon - and no-one in the Labour Party wants to make him.
Every player knows perfectly well that leading Labour into next year's General Election will mean presiding over a disastrous defeat - and no-one, not Mandelson, Harman, neither of the Milibands, wants that hanging round their necks.
This week we heard what the Prime Minister himself has to say on the subject.
In recent weeks more than 70,000 people signed a petition simply calling on the PM to resign. In answer, he said simply:
The Prime Minister is completely focussed on restoring the economy, getting people back to work and improving standards in public services. As the Prime Minister has consistently said, he is determined to build a stronger, fairer, better Britain for all.
Hardly a straight answer then, but I think that's a No. Simon Burgess will be pleased.