From the PM's news conference:
Worried. Very worried. That is how I would feel if I were Harriet Harman. Repeatedly Gordon Brown has refused this morning to give her his unequivocal backing after it was revealed that her campaign for deputy leader accepted money from one of those used by David Abrahams to hide his donations. The Brown campaign and the Benn campaign refused similar offers.
Otherwise, Gordon Brown has adopted the same tactic as he did last week over the missing discs. Before a single question was asked he gave an apology, a denial of knowledge and an enquiry to establish the facts. Critically, and effectively, he also kept his cool.
The problem he has is to explain why the cash for honours saga wasn't warning enough to change his party's practices.