On tonight's Colbert Report, Stephen Colbert took stock of the latest issues hurting the campaigns of the Republican candidates. Newt Gingrich is dealing his ex-wife's open marriage claim, Rick Santorum never shared a couch with anyone but his wife, Mitt Romney didn't really win in Iowa, and things got so bad for Rick Perry that he bowed out this morning. Even Colbert has some problems: the Jon Stewart-lead Super PAC rolled out an ad attacking him yesterday. Who could have known that an off hand remark about Rosa Parks could ever be used against him?

[Colbert Nation]