A truck passes over the Peace Bridge between Canada and the United States, in Fort Erie, Ontario, on August 18, 2026. Cole Burston/AFP via Getty Images Cole Burston/AFP via Getty Images Stay up to date with our Up First newsletter, sent every weekday morning. The U.S. and Canadian auto industries have been tightly woven together for decades. But the latest tariff flareup between the two countries may complicate that. Think of that sticker on the windows of new cars breaking down how much of the vehicle's content comes from the U.S. and Canada. From a manufacturing point of view, content…