They won't admit that one of their own was dirty.
They'll not stop until they've painted Bush dirtier.
There is no conscience. There is no shame. There are no ethics, no principles. No right, nor wrong. Only politics.
Lenin taught them well: "Everything is political."
Americans, by overwhelming majorities, give Bush extraordinarily high marks for ethics, character and trustworthiness, despite the press' best efforts to convince them otherwise. As an "issue", Harken is the quintessential dead horse.