The spot was posted on October 19th, according to its YouTube page, but because it was unlisted on Cain's main YouTube page it seems to have gone undiscovered until now. There has been some speculation online that the spot is a hoax, but the Cain campaign late Monday night confirmed to CBS News that it is legitimate. A campaign official said that the video was "just Block being Block." But it's unclear what the campaign planned to do with the video, whether it was intended to be an ad, or why it wasn't publicly available on Cain's page with his...