US President Donald Trump on Thursday announced plans to decertify all Canada-made aircraft and warned of imposing a 50 per cent tariff on such planes until American-made Gulfstream jets receive certification in Canada, signalling a fresh escalation in trade tensions between the two countries.

In a post on Truth Social, Trump specified that the move would include Bombardier's Global Express business jet, produced in Quebec. "Canada is effectively prohibiting the sale of Gulfstream products in Canada through this very same certification process," Trump wrote. "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."