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President Donald Trump said Thursday that he was terminating trade talks with Canada, effective immediately.

The president accused Canada of trying to interfere with an upcoming Supreme Court case on the legality of his "reciprocal" tariffs.

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Trump's announcement on Truth Social comes after the Canadian province of Ontario began running a television advertisement in the United States featuring a speech from former president Ronald Reagan.

The ad, which Ontario's premier Doug Ford posted on X , begins with Reagan saying, "When someone says, 'let’s impose tariffs on foreign imports,' it looks like they’re doing the patriotic thing by protecting Americ

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