JOHN MICKLETHWAIT: On April 18, Donald Trump went to Wisconsin and promised he would protect the dairy farmers against unfair trade. And he cited Canada in particular. And he also said for good measure, "We're going to get rid of Nafta once and for all." JUSTIN TRUDEAU: One of the challenges that we've seen in the rise of populist or nationalist politics around the world over the past years is a reflection that trade hasn't always been great for everyone. Sometimes it has benefited only the top tier of any economy, certain multinationals, not smaller businesses. The issue, however, is if you end up going down a highly protectionistic route, if you end up creating barriers and tariff walls, you end up slowing down economic growth, and everyone ends up suffering, including and especially the middle class. But in this particular case, he was trying to get rid of the milk subsidies that you give to Canadian dairy producers.
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