The chief executive officers of Canada’s top lumber producers are set to meet on Thursday with International Trade Minister Mary Ng to spur the Canadian government to start talks with the United States to resolve the long-running softwood dispute.    The chief executives are seeking to get the softwood file onto the agenda later this month for the summit in Ottawa between Prime Minister Justin Trudeau and U.S. President Joe Biden.    Scheduled to participate in a virtual round table discussion late Thursday with Ms. Ng are lumber chief executives from ...