Gary Ginsberg joins Greg Kelly to discuss the dynamics that presidents have with their friends.

In fact, that is the subject of Ginsberg's new book "First Friends: The Powerful, Unsung (And Unelected) People Who Shaped Our Presidents." Ginsberg is the perfect person to write this, as someone who had a front row seat to the relationships held by one of America's most famously affable presidents, Bill Clinton.

The book reads like a novel, with incredible detail that shines a light on these relationships. Ginsberg chats with Greg about the amount of research that went on to be an after-the-fact fly on the wall to multiple lives of multiple presidents.

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