U.S. President Donald Trump says he has terminated trade negotiations with Canada over an Ontario government ad that uses former U.S. president Ronald Reagan's own words to spread an anti-tariff message to an American audience.

It's the latest turmoil in ongoing trade negotiations between the two countries, during which Ontario Premier Doug Ford has routinely appealed directly to Americans and taken a more adversarial tone than his federal counterparts.

Sources have told CBC News and Radio-Canada that Trump's decision last night caught the Carney government by surprise. One source said Trump is genuinely reacting to the ad, not using it as pretext for a deeper negotiating tactic.

Trump claims Canada 'CHEATED AND GOT CAUGHT' with Ontario tariff ad, calls off trade talks with Ottawa

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