The bridge that illustrates the lesson about the new U.S.
Everybody knows what’s happening with Donald Trump’s threat to block the opening of a Detroit-Windsor bridge. At least, everybody in the political system in Washington and Ottawa. It’s a shakedown, with a choke point in Canada-U.S. relations as leverage. Detroit border crossings have been used that way for years. Now it’s a pretty good analogy for all of U.S. foreign...