The U-S is set to impose a 20 per cent duty on Canadian softwood lumber heading stateside — and collect them retroactively for the previous 90 days. The first salvo in the anticipated softwood-lumber war appears to be just a precusor for NAFTA renegotiations. Speaking to a gathering of conservative media yesterday, U-S President Donald Trump said Canada has been very good about taking advantage of the U-S through NAFTA. The Trudeau government has condemned the U-S move, calling it unfair, baseless and unfounded — and promised help for the lumber industry in some form. Natural Resources Minister Jim Carr says the action hurts not only Canada’s lumber sector, but also American home-buyers who will have to pay more for wood.