So it's striking, today, that the Lib Dems are probably going even heavier on the Ashcroft story than Labour. While Peter Mandelson is concentrating on why David Cameron "couldn't find the backbone or the bottle to ask [Lord Ashcroft] the relevant questions", Chris Huhne has effectively said that William Hague lied on his Today programme interview this morning. Huhne adds that Hague is now "completely unfit to be Foreign Secretary," and that the Tories have been involved in a "cynical cover-up". That's fighting talk, if ever I heard it.
Of course, it's likely that none of this says anything about the Lib Dems' intentions in the event of a hung parliament. They are, after all, obliged to attack their opponents - so they're going about it with gusto. But it could result in some pretty awkward discussions in a few weeks time.