Trump is right to fear a Canada-Europe team-up. But Canada must rise to the challenge first

News Snapshot:

Open this photo in gallery: Prime Minister Mark Carney, left, is greeted by President of France Emmanuel Macron as he arrives at the Palais de l'Elysee in Paris on Mar. 17.Sean Kilpatrick/The Canadian Press Aaron Burnett is a German-Canadian geopolitics and security analyst based at Berlin’s Democratic Strategy Initiative. The spectre of a deeper trade relationship between Canada and Europe keeps U.S. President Donald Trump up at night – if his latest social-media rant threatening higher tariffs on both is any clue. And that means, all the more, that Canada must seek closer ties to Europe. Mr. Trump is a...