President Donald Trump threatened additional tariffs against Canada and Mexico late Thursday, in his latest move to raise trade tensions with U.S. allies. In a social-media post, Trump threatened 50% tariffs on Canadian-made planes sold in the U.S., and said he would decertify all aircraft made in Canada, in retaliation for Canada not yet certifying certain American-made Gulfstream jets. "Canada is effectively prohibiting the sale of Gulfstream products in Canada through this very same certification process," Trump said on Truth Social. "If, for any reason, this situation is not immediately corrected, I am going to ... (full story)