The real threat to Canadian exporters isn’t U.S. President Donald Trump’s tariffs, it’s Ottawa and Queen’s Park’s (home of the Ontario Legislature) reckless diplomacy.

The latest tariff hike, whether triggered by Ontario’s anti-tariff ad campaign or not, is only a symptom. The deeper problem is Canada’s escalating loss of credibility at the trade table. Washington’s move to raise duties from 35 per cent to 45 per cent on non-CUSMA imports (goods not covered under the Canada-United States-Mexico Agreement, the successor to NAFTA) reflects a diplomatic climate that is quickly souring, with very real consequences for Canadian exporters.

Some analysts argue that a 10-point tariff increase is inconsequential. It is not. The issue isn’t just what is being tariffed; it is the tone of the relationship. Canada is increasingly seen as erratic and reactive, negotiating from emotion rather than strategy. That kind of reputation is dangerous when dealing with the U.S., which remains Canada’s most important trade partner by a wide margin.

Ontario Premier Doug Ford’s stand........

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