The United States imposed 50 per cent tariffs on USD 20 billion of Canadian goods after talks with Ottawa collapsed. Canada's matching response has deepened a rare rupture in ties and clouded North America's trade pact.

The United States has imposed 50 per cent tariffs on USD 20 billion worth of Canadian goods, and Canada has ordered matching retaliation. The collapse of last-minute talks has deepened a historic rift and clouded North American trade negotiations.