Fox News contributor Liz Peek discusses President Donald Trump’s threat of 100% tariffs on Canada on “The Bottom Line.”
president donald trump threatened to decertify Canadian-made planes and impose a 50% tariff unless Canada approves Gulfstream planes, accusing Ottawa of illegally blocking certification while allowing its own planes access to the American market.
The dispute centers on aircraft certification, a regulatory process that determines whether aircraft can be sold and operated in a country. Trump has accused Canadian authorities of using this process to restrict US-made Gulfstream jets.
“Based on the fact that Canada has unfairly, unlawfully and steadfastly refused to certify the Gulfstream 500, 600, 700 and 800 Jets, one of the largest and most technologically advanced jets ever made, we hereby decertify their Bombardier Global Expresses, and until American Airlines makes Great Canada certified, as it should have been many years ago,” Trump said. Social Truth thursday night “Furthermore, Canada effectively prohibits the sale of Gulfstream products in Canada through this same certification process.”
He added: “If, for whatever reason, this situation is not rectified immediately, I am going to collect in Canada a 50% rate. on all aircraft sold in the United States of America. Thank you for your attention to this matter!”
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President Trump warned Canada of 50% aircraft tariffs and possible decertification, accusing Ottawa of blocking Gulfstream jets. (Gulfstream/Fox News)
It was not immediately clear which planes beyond Bombardier’s Global Express line would be affected by Trump’s proposed tariffs, including whether Canadian-built Airbus A220 commercial jets would be included.
FlightRadar24 said in a post on X that more than 400 Canadian-made planes were operating to and from US airports as of early Friday.
Data provider Cirium said 150 Global Express planes are registered in the United States and operated by 115 different operators.
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Trump accused Canada of illegally blocking the certification of Gulfstream jets and said the United States would decertify Canadian-made planes in response. He also warned that he would impose a 50% tariff on all Canadian aircraft unless the issue is resolved immediately. (Harun Ozalp/Anadolu via Getty Images/Getty Images)
FOX Business has reached out to Bombardier and Gulfstream for comment.
In April, the Federal Aviation Administration and the European Union’s Aviation Safety Agency certified the Gulfstream G800 jet, while Transport Canada, which oversees aircraft certification in Canada, did not immediately respond to a request for comment.
It was not immediately clear how Trump would carry out a decertification, since that authority rests with the FAA, although he has made similar statements in the past that were later implemented, sometimes with waivers, by the relevant agencies.

Canadian Prime Minister Mark Carney (L) and President Donald Trump pose for a photo during the G7 summit on June 16, 2025. (Brendan Smialowski/AFP via Getty Images/Getty Images)
In the context of broader tensions between the United States and Canada, Canadian Prime Minister Mark Carney denied on Tuesday that he had retracted the comments that angered Trump, saying that “almost nothing” was normal in America.
Citing US trade policy, Carney last week urged other nations to prepare for the erosion of the rules-based global order long promoted by Washington.
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It has also boosted the diversification of Canadian trade outside the United States, which accounts for approximately 70% of Canada’s exports under the US-Mexico-Canada trade agreement.
Reuters contributed to this report.







