Ex-Drug Czars Bill Bennett, John Walters: Mr. Trump, please don’t legalize marijuana at the federal level

First and foremost, marijuana is already associated with more abuse and dependency (now called substance abuse disorder) than all other illegal drugs combined. Roughly four out of seven problem usersof illegal drugs are using marijuana. This is a dangerous blind spot exploited by many legalization advocates (although some of them are now warning about the growing risk of heavy marijuana use under legalization)....