I'm rejoined by joined by Nicholas Wapshott, the Opinion Editor of Newsweek and an author.

We discuss Sunday's Democratic debate between Senator Bernie Sanders, Secretary of State Hillary Clinton and Maryland Governor Martin O'Malley. This includes exchanges between Clinton and Sanders on his voting record regarding guns, his healthcare plan, and much more.

Nicholas Wapshott's newest book is titled "The Sphinx: Franklin Roosevelt, the Isolationists, and the Road to World War II." (The book is available at www.wwnorton.com/books and Amazon.com). His Twitter handle is @NWapshott.

(Image courtesy of Mic Smith / AP)