In an interview with Harry Smith on CBS' "Early Show" Friday morning, President Obama called out Glenn Beck and Rush Limbaugh as purveyors of "vitriol" - creating a climate in which he's called a "socialist" and even a "Nazi." Smith asked the president if he was "aware of the level of enmity that crosses the airwaves and that people have made part of their daily conversation about you." Obama replied, "When you've listened to Rush Limbaugh or Glenn Beck it's pretty apparent." The rancor is "troublesome," he said, but he acknowledged it's also a recurring phenomenon. "Keep in mind that...