How will sexual harasment allegations affect Cain's 2012 aspirations?

A shocking new report by Politico suggests Herman Cain was accused by two women of sexual assault back in the 1990s. The Cain campaign claims that the report is "unsubstantiated." But the bad press threatens to affect the former Godfather's Pizza mogul's front-runner status.

Carol Costello sits down with CNN contributer John Avlon to asses the damage to Cain's nomination chances – and where he thinks his campaign is headed from here.