President Donald Trump escalated tensions with Canada on Friday, declaring the country responsible for costs stemming from wildfire smoke choking major U.S. cities and threatening to impose additional tariffs as punishment.
Writing on Truth Social, Trump characterized the air quality crisis as "Willful Negligence" and claimed the pollution was "costing the United States Billions of Dollars." He argued that expenses tied to the deteriorating air quality should be tacked onto existing tariffs Canada already pays.
"We are holding Canada responsible for the fact that they are not properly maintaining their Forests, and Brush therein," Trump wrote, adding that the U.S. was being "unnecessarily invaded by filthy, polluted, and unhealthy air, the quality of which is dangerous, and totally unacceptable."
Trump said he planned to contact Canadian Prime Minister Mark Carney about the situation. The tariff threat continues a pattern of using trade penalties as leverage in international disputes.
Smoke from wildfires across Minnesota and Canada has prompted air quality alerts for more than 100 million people. Major population centers including Minneapolis, Chicago, Detroit, Cleveland, Pittsburgh, Philadelphia, and New York City face hazardous conditions heading into the weekend.
The poor air quality has raised concerns about Sunday's World Cup final in New Jersey, which Trump plans to attend. At a FIFA reception Friday, the president praised the tournament's success and suggested the U.S. should host the World Cup again, joking that the next time America hosts, it should "leave Mexico and Canada out."
Canadian Prime Minister Carney responded Thursday to mounting criticism of his country's response to the wildfires, deflecting by pointing to U.S. environmental policies. Speaking in French to reporters, Carney said each nation bears responsibility for its own approach to climate issues. He noted that Canada was investing in clean energy while the U.S. pursued "modes of production which are working against clean energy."
The exchange reflects deeper friction over climate policy. Since taking office, Trump has suspended U.S. participation in dozens of international climate initiatives and research programs. In March, universities filed suit against the Trump administration over its push to dismantle the country's largest federal climate research center.
Trump's tariff warning comes weeks after his administration announced plans to withdraw from the U.S.-Mexico-Canada Agreement on July 1. That trade deal has served as a cornerstone of North American economic stability for the past six years.
Author Sarah Mitchell: "Trump's weaponizing of a natural disaster for tariff leverage is pure political theater, but the health risks from this smoke are absolutely real."
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