Canada’s government said it will challenge US duties on softwood lumber, saying the tariffs have caused “unjustified harm” to the industry and workers.  “Canada is disappointed that the United States continues to impose unwarranted and unfair duties,” International Trade Minister Mary Ng said in a statement Thursday. “While the duty rates will decrease from the current levels for the majority of exporters, the only truly fair outcome would be for the United States to cease applying baseless duties.”  Ottawa will request dispute settlement through the US-Mexico-Canada trade agreement after the Commerce Department ruled ...