Three developments signal a new regulatory regime is on the way. -The U.S. Department of Justice announced it will not interfere with marijuana retail sales as long as all state and Federal rules are followed and all taxes are paid. -The U.S. Treasury Department's Financial Crimes Enforcement Network issued formal guidance to U.S. banks on how to do business with marijuana firms. -The President of the United States mentioned marijuana and alcohol in the same sentence. An enormous, quasi-dormant underground economy is awakening and large components are coming to the surface. Taylor West,...