Canada already is working on challenges to the U.S. tariffs under NAFTA and the WTO.

Top Canadian officials pledge to defend their industry and threaten litigation under multilateral trade pacts.

Chances may be improving for resolving a long-running trade dispute over pricing of Canadian softwood-lumber shipments to the U.S.

U.S. lumber companies praise Commerce Dept. action, but Canada vows a strong defense.

U.S. lumber producers praise Commerce Dept. action but Canada blasts it and threatens litigation.

NAHB is concerned that lumber import restrictions could cut supply and boost prices significantly.

Coalition asks Commerce Dept. to impose duties on Canadian lumber shipments that, it contends, are being dumped in U.S.

Yearlong US-Canada moratorium on launching lumber trade actions against each other expired Oct. 12.