Pennsylvania state Sen. Daylin Leach, a long-time supporter of marijuana reform and previous sponsor of several medical marijuana bills, announced Monday that he will introduce a bill that would make adult possession of up to an ounce of marijuana legal and would tax and regulate the substance. According to The Times Herald, the latter policy is what may eventually swing lawmakers in his state: But money, more than moral appeals or anything else, might talk the loudest in the drive to decriminalize…