Politics and the Economy; Nicholas Wapshott; Remembering Mary Semans

Journalists David Leonhardt, Greg Ip, Mark Halperin, and Jeff Greenfield debate this week's events in politics and the economy. Author Nicholas Wapshott provides explores the dispute between economists John Maynard Keynes and Friedrich Hayek in "Keynes Hayek: The Clash That Defined Modern Economics." Charlie remembers philanthropist and arts activist Mary Duke Biddle Trent Semans with a look back at a 2008 interview with Semans and her cousin Anthony Drexel Duke.