I don’t think this is a game-changer but if it rattles Obama for the debate tomorrow, that’s great. If the Romney campaign can distil some gems out of the clip for some hard-hitting ads, even better.
It’s not what Obama says in the video that will damage him, it’s how he’s saying it. He has carefully projected the image of being an intelligent (even intellectual) black man who is “post-racial” - i.e., not angry with whites. This video belies the contrived image...IMO.
If they wanted to rattle him then a few hours before the debate would have been better. Make him wonder just whats coming overnight.