By David Ljunggren
OTTAWA – Talks between the United States and Canada on a long-running dispute over softwood lumber exports have bogged down amid “significant differences,” the two nations said on Friday, potentially paving the way for a fresh round of lawsuits. U.S. producers complain that Canadian lumber is subsidized, and have in the past launched trade challenges that resulted in the United States imposing billion of dollars in tariffs. The most recent round of arguments ended with a 2006 deal that expired in October 2015. Both sides agreed to take no action for a year after that, but without a new treaty, U.S. firms have made clear they will file new damage claims.