Craig Fehrman reveals five things you never knew about the U.S. Presidents and the books they wrote.

Doris Kearns Goodwin, author of "Leadership: In Turbulent Times," discusses how her four principal subjects - Abraham Lincoln, Franklin D. Roosevelt, Lyndon Johnson, Theodore Roosevelt - recognized their passion to pursue politics, and how we can do so in our own lives.

Founder and CEO of Jigsaw at Alphabet Inc. Jared Cohen comes into the studio to talk about "The Accidental Presidents" and hand out reports cards to the eight presidents featured in his book.