Post-argument debate on the constitutionality of Obamacare By David Kopel on April 18, 2012 12:00 am in Commerce Clause, Constitutional History, Constitutional Law, Federalism, Health Care, Individual Mandate, Necessary and Proper, Taxing and Spending Clause Held at Denver University, Sturm College of Law, on April 11. Debaters were University of Colorado Prof. Scott Moss and me. Moderator is DU Prof. Ann Scales. WMV, via ftp.