"The Safe Neighborhoods and Schools Act" isn't living up to its promise. Also known as Proposition 47, the California ballot initiative, which was approved in November 2014 with 60 percent of the vote, downgraded drug possession and many property crimes from a felony to a misdemeanor. Proponents argued that lesser punishment for low-level offenders would enhance public safety. San Francisco District Attorney George Gascon was the rare prosecutor who pushed for its approval. He told the San Francisco Chronicle, "What we have been doing hasn't worked, frankly." Gascon spokesman Alex Bastian told me, "The voters indicated that possessing small amounts...