Mark Grimaldi, Executive Producer of The Leslie Marshall Show, and Nicholas Wapshott, Opinion Editor of Newsweek, guest host for Leslie this hour.

They analyze the GOP debate on National Security and Terrorism. This includes the battles between Jeb Bush and Donald Trump, Rand Paul and Donald Trump, Rand Paul and Chris Christie, Ted Cruz and Marco Rubio, 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. You can follow Nicholas on Twitter @NWapshott, and Mark Grimaldi @MarkJGrimaldi.

(Image courtesy of Patrick T. Fallon/Bloomberg)