Florida super PAC brackets Obama's visit with ad buy

— -- A super PAC supporting Florida Rep. Connie Mack's Senate bid unveiled an ad buy in Florida media markets Thursday to bracket President Barack Obama's campaign swing through Florida, Politico reported.

Mack, who acted as a surrogate for Mitt Romney's presidential campaign  by attending the events of Romney's competitors during the Republican primaries, is running against Democratic Sen. Bill Nelson, who is mentioned in the ad.