"Thirty-five states have Canada as their largest export market. Let's say we get into a trade war with the United States - hopefully not, but let's say. Many states in the union are going to have trouble and more costs getting their stuff up to Canada. If we make the border a little thicker in terms of tariffs, and hit back, that will start to impact the states, in particular large business interests that are in Canada. And that starts to put indirect pressure on the White House."