....yet?
There's nothing left to throw at him. The left have failed to land a fatal blow and they're mighty pissed about it.
Any drama about misinterpretation of his tax status will blow over, but his funding of the Tory party will continue all the way through the election campaign and be far more valuable to them than perceived whiff of scandal dragging along behind.
Labour have blown it with their attempt on Ashcroft - the only things that they could possibly use to separate him from their own non-dom donors in the Lords is his letter of commitment with its interpretation and his company donations. The Electoral commission have put paid to problems with the latter (as mefty has illustrated it was never going to be an issue given the flimsy law applicable to BOTH parties donors) and The Lords honours committee have said they cant look at the former issue retrospectively. So it's a busted flush. Labour can now go off and lick their wounds and dream of a donor daft enough to back them and bail them out of electoral bankruptcy.