With the United States and Mexico having both signed off on a reworked North American Free Trade Agreement (or whatever President Trump wants to call it), negotiators are now attempting to secure a last-minute agreement with Canada by a Friday deadline. The Trump administration has threatened auto tariffs on Canada if they don’t climb aboard. Because Mexican president Enrique Peña Nieto’s term ends in November, and U.S. trade law requires a 90-day waiting period before all parties can sign, the final agreement must be completed by August 31.