PORTLAND — Lumber and dairy tariffs on Canada could impact Maine much more than other states because of our close trade ties to our northern neighbors. Maine imports about $200 million worth of lumber from Canada each year. Canada will likely push any new tariff costs onto U.S. customers. …But right now, the threat of lumber tariffs is prompting unpredictability and fear in the construction industry. “Our retailers are having difficulty keeping quotes with the builders,” Northeastern Retail Lumber Association President Rita Ferris said. “Builders are getting stressed out because they can’t promise a solid price to their customers. So there’s a big fear out there that things are going to slow down in a hurry.” …The Northeastern Retail Lumber Association says a lumber tariff will cut both ways. Ferris says a lumber trade war will hurt Canada and Maine. “Mills will close down, because who’s going to buy it at that price?” Ferris said.