WASHINGTON - Canada is being pressed for freer trade in online goods by a number of American states, with eight state governors writing a letter seeking an expansion of Canada's low limits for online duty-free purchases. Their letter to Foreign Affairs Minister Chrystia Freeland and U.S. trade czar Robert Lighthizer says the NAFTA talks are an opportunity to review the $20 limit for what Canadians can buy online without paying duties on foreign goods. ...