Trump pledges big tariffs on America's three largest trading partners

US President-elect Donald Trump on Nov 25 pledged big tariffs on the US' three largest trading partners - Canada, Mexico and China - detailing how he will implement campaign promises that could trigger trade wars.

Trump, who takes office on Jan 20, 2025, said he would impose a 25 per cent tariff on imports from Canada and Mexico until they clamped down on drugs, particularly fentanyl, and migrants crossing the border, in a move that would appear to violate a free trade deal.

Trump also outlined "an additional 10 per cent tariff, above any additional tariffs" on imports from China.

It was not entirely clear what this would mean for China, as he has previously pledged to end China's most-favoured-nation trading status and slap tariffs on Chinese imports in excess of 60 per cent - much higher than those imposed during his first term.

"On Jan 20, as one of my many first executive orders, I will sign all necessary documents to charge Mexico and Canada a 25 per cent tariff on all products coming into the United States, and its ridiculous open borders," he said in a post on Truth Social.