The defect of power in the existing Confederacy to regulate the commerce between its several members, is in the number of those which have been clearly pointed out by experience
Camp Lone Star – Federal Gun Laws and the Commerce clause
The entire "Felon in Possession" federal law is hinged on Commerce. From its inception, it has been enforced by taxation, since the Bureau of Alcohol, Tobacco, and Firearms is an agency of the U. S. Treasury department.