Mark McKinnon first dreamed up the idea for a behind-the-scenes documentary series about the grueling nature of a presidential campaign back in 2002. Fourteen years later, "The Circus " is a smash hit on Showtime! In this episode of The Golden Mean, Mark joins Michael to talk about producing the show, this crazy political season, the upcoming presidential debates - and the hidden meaning behind his ubiquitous Open Road Stetson!