WASHINGTON - Prime Minister Justin Trudeau spoke by phone with President Donald Trump on a day the United States revealed it might use the threat of tariffs as a negotiating tactic to force a quick NAFTA deal. On Monday, Trump explicitly linked the fear of tariffs on steel and aluminum to the ongoing negotiation of NAFTA, then his trade czar elaborated: Robert Lighthizer said the U.S. is in a hurry to get an immediate NAFTA deal, and if it happens ...