As the U.S. government appeared in court Wednesday to defend its use of emergency powers to impose a sweeping, global array of tariffs, the alleged “emergency” presented by Canada appeared to be shrinking by the month.

President Donald Trump cited what he calls a “flood” of fentanyl from Canada when he invoked an emergency-powers law to circumvent Congress and impose 35 per cent duties on goods imported from here.

But the latest U.S. statistics add to existing questions around that allegation. After a brief spike in the volume of fentanyl that American authorities seized at the Canadian border in April and May, the numbers have plummeted to their lowest level since July of 2023.

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