Today's North American economic nationalism isn't unprecedented – it's a pattern

Open this photo in gallery: Flags wave in the wind near the Ambassador Bridge in Windsor, Ont., on Feb. 4.Carlos Osorio/Reuters Laurence Mussio is the author of Whom Fortune Favours: Bank of Montreal and the Rise of North American Finance. Marvin Suesse is the author of The Nationalist Dilemma: A Global History of Economic Nationalism. As headlines scream about U.S. tariffs and trade wars, a curious amnesia has gripped North American policy circles. The breathless tone of current commentary suggests we're entering unprecedented territory. Yet this present crisis demands something more valuable than panic: perspective. Since 1840, North America has…