I heard that James Madison was a pretty smart guy...
“The practice of medicine consists of the delivery of intimate services to the human body. In almost all instances, the delivery of medical services occurs in one place and does not move across interstate lines. One goes to a physician not to engage in commercial activity, as the Framers of the Constitution understood, but to improve one’s health. And the practice of medicine, much like public school safety, has been regulated by states for the past century.”