12/12/2008 05:12 am ET Updated May 25, 2011

New Evidence Mark Penn To Blame For Major Clinton Mistake

Hillary Clinton's first major mistake of the campaign, her staff has long admitted, was whacking Barack Obama after his supporter David Geffen trashed Clinton to New York Times columnist Maureen Dowd on Feb. 20, 2007.

Much of the blame for the overreaction has been shouldered by Clinton communications boss Howard Wolfson, who demanding an apology from Obama -- and insisted Obama's campaign return Geffen's campaign contributions.

But Newsweek's epic account of Obama's campaign this week points a finger at Clinton's top strategist and pollster Mark Penn. The controversial Penn, the story claims, advocated a scorched-earth response -- then trashed Wolfson for the response when it triggered a damaging backlash.

Read more on CBS News