Here's the thing about the American auto industry: It is, more than anything, the North American auto industry. Over the past few decades, the factories, product planning, parts networks and supply chains are have become deeply intertwined across the United States, Mexico and Canada. President Donald Trump doesn't believe the latter two countries have treated the U.S. "fairly," and as he starts a trade war to rectify that situation, the auto industry is one of the most powerful and damaging tools in his arsenal.
