The only think I see is a lot of unsourced items you copied off of some pro-drug site. Although, the one by Reagan that mj causes brain damage is true and he probably said something like that.
Unsourced? Check below each quote. What do you want, a digital photograph? Noob.
Maybe Reagan should have had some ganja. It might have at least forestalled his later Alzheimer's, if the researchers mentioned in the OP are correct.