New York City Comptroller and mayoral candidate John Liu made headlines this week when he proposed regulating and taxing marijuana sales for adults 21 and older. In a formal statement, he said: New York City’s misguided war on marijuana has failed, and its enforcement has damaged far too many lives, especially in minority communities. It’s time for us to implement a responsible alternative. Regulating marijuana would keep thousands of New Yorkers out of the criminal justice system, offer relief to…