If Canada's new government chooses to legalize marijuana beyond medical use then it should get into the business of controlling its supply and sale to prevent the rise of a "Big Cannabis," addiction specialists say. Cannabis policy could be an issue ahead of October's federal election. The governing Conservative party favours the status quo, the competing Liberals seek to legalize, regulate and tax, and the New Democrats support decriminalization. (See also: State of the Evidence: Cannabis Use and Regulation)