Instead , he is focusing on upcoming caucuses in Nevada , Colorado and Minnesota in a bid to win more delegates so he can wield influence at the Republican convention in August . Rick Santorum calls Barack Obama `` the worst president this country has ever seen '' and says he would have been a better choice than Mitt Romney. They take jabs at Obama ahead of the State of the Union address . Mitt Romney releases his 2010 tax return .
Rick Santorum calls Barack Obama `` the worst president this country has ever seen '' and says he would have been a better choice than Mitt Romney. They take jabs at Obama ahead of the State of the Union address . Mitt Romney releases his 2010 tax return .