US President Donald Trump has threatened to impose a 50% tariff on all aircraft sold by Canada into the United States, escalating trade tensions amid a growing dispute with Canadian Prime Minister Mark Carney.

Trump announced the threat in a social media post, calling it retaliation for Canada’s refusal to certify aircraft manufactured by Gulfstream Aerospace, a US-based company headquartered in Savannah, Georgia. He warned that the US would respond by decertifying all Canadian aircraft, including those produced by Bombardier.

“If, for any reason, this situation is not immediately corrected, I am going to charge Canada a 50% tariff on any and all aircraft sold into the United States of America,” Trump said.

The latest warning comes just days after Trump said he could impose a 100% tariff on Canadian imports if Ottawa moved ahead with a planned trade agreement with China. While Canada has already concluded that deal, Trump did not outline any specific timeline or mechanism for implementing the proposed tariffs.

The remarks underscore rising trade friction between the US and Canada, particularly over aerospace certification, industrial policy, and Canada’s growing trade engagement with China.