He said that it was a "blatant attack" and that he would set a new tariff rate on Canadian goods within the next week.

The move plunges US-Canada relations back into chaos after a period of relative calm that included a cordial G7 meeting in mid-June where Trump and Canadian Prime Minister Mark Carney agreed to wrap up a new economic agreement within 30 days.

It also came just hours after US Treasury Secretary Scott Bessent struck an upbeat tone on trade, touting progress had been made with China on reviving the flow of critical minerals for the US manufacturing sector and in other key tariff negotiations.

The often-chaotic rollout of Trump's import levies since his return to office this year has frequently whipsawed financial markets, and has begun to weigh on consumer spending, the bedrock of the US economy.

US stocks were briefly batted lower by his broadside against Canada, but the S&P 500 and Nasdaq managed to close out the week at record highs.

Trump's action comes ahead of Canada's plans to begin collecting on Monday a previously enacted digital services tax on US technology firms, including Amazon, Meta, Alphabet's Google and Apple, among others.

--Reuters--