Arch Campbell, Cynne Simpson and Prof. Kim Meltzer of Georgetown University talked about Oprah Winfrey's impact on America.

And Politico Senior Editor David Mark addressed the latest on the race for the 2012 GOP presidential nomination on the heels of Tim Pawlenty's announcement that he would enter the republican primary, and Mitch Daniels' decision not to run.

You can watch the full show below

Tuesday at 10am: Pedestrian dangers in the District and preventing Hepatitis B in the Asian Pacific American community.