That (CSA) falls under regulating interstate commerce instead of tax powers. Picking up a flower and smoking it on the spot is interstate commerce thus i dont think this same idea applies.
Pretty sure they were pointing out the absurdity of Gonzales v. Raich (545 U.S. 1)... But that really is the holding of the US Supreme Court in that case.
I don't quite follow - would you be able to explain the argument behind this for me?