Bangladesh, Jan. 30 -- US President Donald Trump has issued a sharp warning to longtime allies Canada and the United Kingdom regarding their recent efforts to strengthen economic ties with China, describing such moves as “very dangerous” for both nations. At the same time, he escalated a trade dispute with Canada, threatening to decertify Canadian-made aircraft and impose a 50% tariff on plane sales to the United States. The remarks highlight continuing strains between Washington and its allies over geopolitics, trade, and the influence of Beijing.

Trump made his comments on January 29 during the premiere of a documentary about First Lady Melania Trump. When asked about the recent UK-China summit in Beijing, he warned: “...