Election outcomes considered
In just four days' time the Browns may be packing their things to leave Downing Street. The Camerons may be moving in.
That certainly is the growing expectation of politicians on all sides - speaking privately, of course.
All emphasise that this campaign has been more unpredictable than any they can recall; that the polls and anecdotal evidence show that many, many people have yet to make up their minds and that there is still time for things to change.
Labour HQ was relieved not to slump into third place after Gordon Brown's disastrous encounter with Mrs Duffy.
However, some ministers have told me that their hope is not that Labour will win but that they might come second in the popular vote and win enough seats to make the Liberal Democrats an offer they cannot refuse. Some mutter that the price they may have to pay is replacing Gordon Brown with a new leader.
The Conservatives expect to come first but do not know whether they can win enough seats to govern without depending on the support of other parties - which is a far cry from their confidence of a clear majority before the campaign started.
The Liberal Democrats insist that the polls show that they can still come second and are praying that as voters focus on the choice between two occupants of Downing Street that their vote is not squeezed.
All agree that we/they can't know the outcome of an election which has yet to take place.
That doesn't stop them/us having to consider an outcome which - whatever happens - will make political history.