The International Trade Commission will hear arguments on whether Canadian softwood lumber imports are harming the U.S. industry this week -- a week in which the North American Free Trade Agreement will remain a major topic of conversation as the U.S., Mexico and Canada gird for what promises to be an eventful third round. The Tuesday ITC hearing will include the usual suspects as Canadian and U.S. lumber interests and a group seeking the exclusion of old-growth coastal timber have...