This man swore to take a bullet for the President of the USA but then became disillusioned and left. He then moved on to challenge the political system because he doesn't believe that the institution of the Presidency is living up to its expectations.

Once a Secret service agent and part of the Presidential Protective Division, he served under George Bush and most recently, President Obama.

He's received a string of commendations throughout his career and was one of the most distinguished agents to have ever served the President.

He has now written a fascinating book called "Life Inside the Bubble" which is on the New York Times and the Amazon Bestseller list.

Listen to author Dan Bongino reveal "Life Inside the Bubble":