Interstate commerce is not an obscure concept it is the foundation of the Union. It is what caused the Feds to be created in the first place. To administrate commerce between nations, both within and without. Administrate commerce means to "interdict traffic". Basically that means send out your highway men to skim off a portion of the value of the "trafficked items". Another key principle backing the sovereign/freeman/state resident philosphy. Of course the main problem is that stem cells are somehow a drug. Completely ludicrous claim. Interesting read on Herbalism and a history of the concpet of pharmaceuticals as 'Drugs" here at the wiki. So what is a drug?