So perhaps the best thing we can do here is to give you some context on how big a deal the imposition of tariffs here would be. The key thing to remember is that North America has been, in effect, a free trade zone for decades. Goods move back and forth across the borders so frequently that the number of crossings is almost incalculable. Consider an example highlighted by the Wall Street Journal recently. It pointed out that a piston - a component of a car component, might cross the border, back and forth between Canada and the US and...