Could Donald Trump be good for Canada? The reflexive answer is no. The U.S. president-elect is threatening to impose a 25 per cent tariff on our exports. He promises to deport millions of illegal migrants, many of whom may run to our border. He mocks Canada as the 51st state — a threat that is no joke. Just this week he mused about retaking the Panama Canal and buying Greenland. If he fully embraces Manifest Destiny, all North America becomes fair game.