Scheiffer asks about the negative tone

McCain says he regrets the negativity, brings up his town hall idea, makes some good points, I don't think the public financing point was neccessary though, you can't call someone out when the question denounces negativity.
Obama's answer here is okay, although McCain hasn't run 100% negative ads, that's untrue. A good question by Scheiffer doesn't get good answers, and the candidates just use it as a forum to attack eachother.
Viewers are probably rolling their eyes.