Mark Levin has become one of the hottest properties in Talk radio and is also one of the top authors in the conservative political arena. In a short period of time, Mark has become one of the most-listened-to radio Talk show hosts in the nation. Mark Levin is also a contributing editor for National Review Online, and writes frequently for other publications. Levin has served as a top advisor to several members of President Ronald Reagan's Cabinet--including as Chief of Staff to the Attorney General of the United States. He also practices law in the private sector, heading up the prestigious Landmark Legal Foundation in Washington DC.