Ken Rudin, NPR's political editor, discusses what's at stake with just one day left before the Iowa caucuses. Also, a meeting scheduled to take place in Oklahoma on Saturday is widely interpreted as an effort to generate an independent third-party campaign with New York mayor Michael Bloomberg at the helm.
Ken Rudin, NPR's political editor, writes the "Political Junkie" column and has a weekly podcast called "It's All Politics"
Ann Selzer, president of Selzer & Company, the research and polling firm that conducts The Des Moines Register's poll
Christine Todd Whitman, former head of the Environmental Protection Agency; former governor of New Jersey