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The United States imposed 50 per cent tariffs on some ‌Canadian goods on Saturday after the two longstanding allies failed to reach a trade deal, with each side accusing the other of derailing days of talks.

The tariffs that came into effect just after midnight (0400 GMT) on some $20 billion of Canadian goods — things like wooden ice hockey sticks that are rarely used anymore — are far ​from an economic game-changer for the largest US trading partner after Mexico. That represents just over 5pc of Canada’s exports to ​the US.

But the new tariffs mark an increase in tensions between President Donald Trump and Prime Minister Mark Carney, ⁠and will likely make broader talks to renew the US-Mexico-Canada free trade agreement more difficult.

Carney said he had suspended trade negotiations and ​Canada would retaliate “dollar for dollar” on the new tariffs.