He's the creator and producer of NBC's new series Mr. Sterling, about a freshman senator on Capitol Hill. O'Donnell was a writer and producer for the first two seasons of NBC's The West Wing. Before his television career, O'Donnell was in politics himself. He was Democratic chief of staff of the United States Senate Committee on Finance from 1993 to 1995. Prior to that he was senior advisor to Senator Daniel Patrick Moynihan D-NY from 1989 to 1992. Currently O'Donnell is also senior political analyst for MSNBC.