Trump threatens new tariffs on Canada over wildfire smoke affecting US cities

Trump escalates rhetoric over drifting wildfire smoke

Former US President Donald Trump has threatened Canada with new tariffs, accusing the country of allowing wildfire smoke to drift across the border and choke American cities. In a statement, Trump said the US is being 'invaded by filthy air' and warned that Canada must pay a price for what he called a failure to control its wildfires.

The comments come as large swathes of the northern US, including parts of the Midwest and Northeast, have experienced hazardous air quality due to smoke from Canadian wildfires. The situation has reignited a familiar pattern of cross-border finger-pointing over environmental and trade issues.

Senator Moreno introduces bill to sanction Canada

Trump's threat is not an isolated political outburst. Republican Senator Bernie Moreno of Ohio has announced a bill in the US Senate that would impose sanctions on Canada over what he described as a 'wildfire pollution emergency'. The proposed legislation is intended to pressure the Canadian government to take more aggressive action to prevent or contain wildfires that generate transboundary smoke.

The bill's language reportedly frames the smoke as a public health and economic threat, arguing that the US has the right to protect its citizens and commerce from foreign-sourced environmental hazards. The exact mechanism of the proposed sanctions has not been detailed, but trade penalties are likely to be a central feature.

Trade tensions resurface over an environmental issue

This is not the first time Trump has used tariff threats as a diplomatic or political tool. His 'America First' trade policies during his presidency frequently targeted Canada, notably over lumber, dairy, and steel. The current threat, however, marks a rare instance of linking trade penalties directly to an environmental and public health issue.

Canadian officials have not yet issued a formal response to Trump's remarks or the Moreno bill. The wildfires in question are largely driven by drought and record-breaking heat, conditions that scientists say are becoming more frequent due to climate change. Canada has faced one of its most severe wildfire seasons in recent years, with millions of hectares burned.

What the smoke means for American cities

Major cities such as New York, Chicago, and Detroit have seen air quality indices spike to unhealthy levels multiple times this summer. Schools have been forced to move activities indoors, and hospitals have reported an uptick in respiratory complaints. The smoke has also disrupted flights and outdoor events, causing economic losses that run into millions of dollars.

The situation has put the Biden administration in a difficult position. While it has offered federal assistance to states affected by the smoke, it has stopped short of blaming Canada. The White House has instead emphasised the need for bilateral cooperation on wildfire management and climate resilience.

Diplomatic fallout and next steps

The tariff threat adds a layer of unpredictability to US-Canada relations, which have been largely stable under President Biden. Trade experts say that imposing tariffs on environmental grounds would be legally questionable under USMCA and WTO rules, but that has rarely stopped Trump from pursuing aggressive trade actions in the past.

For now, the Moreno bill is in its early stages and faces an uncertain path through a divided Congress. Whether it gains traction will depend on how long the wildfire smoke persists and how much political pressure builds from affected states.

What remains to be seen is whether the Canadian government will treat this as a serious trade dispute or dismiss it as election-year rhetoric. Either way, the air over American cities has become a new front in an old battle between the two neighbours.