Well, for everyone who had eyes to see, this thing stunk to high heaven. But now we have official word that that McCain volunteer who had the straight-out-of- the-trash-novel story about being assaulted by a mugger-cum-Obama-activist has confessed that the whole thing was a hoax. It is the classic story that is so perfect for certain malevolent actors that if it hadn't happened they'd have to make it up. As indeed they did.

To say this is a dark moment does not do justice to the deep awfulness of this stunt. It's the metaphoric pedal-to-the-metal for the sleazy sub-rosa campaign of racial fear-mongering that so far has failed to derail Obama's candidacy.

There are many questions to be asked about who pushed this story yesterday afternoon and last night. A lot of explaining.