Trump could crush Canada's softwood exports. Here's how a new crisis could play out

WASHINGTON, D.C. — The Canada-U.S. softwood lumber trade relationship has dealt with ups and downs, disputes and resolutions, for decades. Anxiety for Canadian exporters is reaching a fever pitch again as the U.S. threatens to more than double softwood lumber duties and add even steeper tariffs under a national security investigation. 

Canadian foresters, mills, and governments that enjoy taxes, economic spinoffs and stumpage fees from Crown land will feel the pain if they lose too much...