Constitution USA: Discussion with Dr. Mark McKenzie By Paul Hunton • May 7, 2013 ShareTwitter Facebook Google+ Email Constitution USA airs Tuesdays at 8pm on PBS Channel 5. KTTZ produced these interstitials to give deeper insight into the program. Host Paul Hunton sat down with Dr. Mark McKenzie of Texas Tech University. Watch the first full episode of Constitution USA! Watch the full episode. Tags: ConstitutionUSAkttzpbslubbocktexastechpetersagalconstitutionusavsloopez Related Content Constitution USA Premieres Tonight! 2 years ago View the discussion thread.