Sean sits down with "The Great One," Mark Levin, to discuss his book "Rediscovering Americanism" and the future of this great country. What do we mean about liberty? Why was liberty so important to the Founding Fathers? Understanding our past is the key to our future and Mark proves why he's "The Great One." The Sean Hannity Show is live weekdays from 3 pm to 6 pm ET on iHeartRadio and Hannity.com.