USTR slams World Trade Organization panel's nonbinding ruling, weighs next step.

NAHB seeks boost in U.S. lumber production, launch of new lumber trade talks with Canada.

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.

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.