India, Jan. 30 -- Donald Trump threatened Canada with 50% tariff on aircraft sold in US. He said the move was retaliation for Canada's refusal to certify jets made by Savannah, Georgia-based Gulfstream Aerospace, adding that the US would respond by decertifying all Canadian aircraft, including those built by Bombardier.

Trump's threat posted on social media came after he threatened over the weekend to impose a 100% tariff on goods imported from Canada if it went forward with a planned trade deal with China.

"Canada is effectively prohibiting the sale of Gulfstream products in Canada through this very same certification process," Trump wrote on Truth Social.

"If, for any reason, this situation is not immediately corrected, I am going to...