Prime Minister Mark Carney said earlier this month that a future trade agreement with the United States could include quotas on softwood lumber, an area that has caused friction between the two countries for years before the latest trade war.

The American department had issued a preliminary anti-dumping rate in March of 20.07 per cent, up from 7.66 per cent set three years before, which is in addition to the countervailing duties of 6.74 per cent.

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