Some of the fastest-growing U.S. exports to Canada this year are gasoline, commercial vehicles, oil and motor vehicle parts. ustradenumbers.com I do not mean to minimize the impact the 50% tariffs that President Trump and Canadian Prime Minister Mark Carney have slung at each other in their schoolyard spat could have on some American and Canadian businesses, workers and consumers. But this isn't a trade war like the one Trump kick-started with China during his first term. In that one, which is ongoing, Trum ...