John O'Sullivan joins KCRW's Friday afternoon show "Left, Right and Center" as the regular in the right seat. He is Editor-in-Chief of The National Interest, senior fellow at the Nixon Center and Editor-at-Large of National Review. O'Sullivan had been sitting in for David Frum but now he's the official new guy. The rest of the scrum remains the same: Robert Scheer and Arianna Huffington on the left, Matt Miller as the moderator and the more or less centrist.