Homeowners and home buyers scored a rare... victory... when a three-person arbitration panel ruled unanimously that U.S. tariffs against imported Canadian softwood lumber violate the North American Free Trade Agreement (Nafta).... [R]escinding the tariffs will reduce the average construction cost of a new home by about $1,000 and make about 300,000 more moderate-income Americans eligible for mortgages. Instead of hailing the move as a welcome step toward more affordable housing, the Bush administration insists that it won't lift the tariffs, which can reach as high as 27%. It further plans to engage in more stalling tactics by appealing the decision...