Of the female conservatives to emerge since Sarah Palin, Michelle Bachmann is the only one still standing. Palin and Bachmann were once allies, but comments made by a Bachmann staffer have driven a wedge between them. Palin's bus tour, which is seen as stirring controversy rather than sell herself as a serious, potential candidate. Bachmann, on the other hand, is formidable. She resisted a multimillion dollar Democratic effort to crush her Congressional campaign. Does either have a chance of being nominated, or will their shared base be turned off by their fisticuffs?