Gov. Andrew Cuomo, in announcing his budget proposal, included a call for a study of the impact on New York of legalizing the adult use of marijuana. This proposal is a change from the governor’s past views on the topic; he previously said he was opposed to legalization, citing the now-debunked “gateway theory” as the reason. In fact, marijuana is simply a gateway to the criminal justice system and the lifetime of collateral consequences that come with a conviction. While this is encouraging news,…