I think he is clearly being manipulated by the pharma lobby. They know he has an antiquated "Reefer Madness" view and so they're happy to use that in their fight against medical marijuana. It's sickening.
I know that pharmacists usually take a pharm version of the Hippocratic Oath when they graduate from their pharm school. I would really love to see legislation that requires every corporate officer and member of the board of director of any pharmaceutical manufacturer to take the pharmaceutical version of the Hippocratic Oath on an annual basis.