'This is willful negligence': Trump threatens new Canada tariffs as wildfire smoke chokes US cities

US President Donald Trump has threatened to impose new tariffs on Canada, accusing the country of 'willful negligence' as massive wildfires continue sending thick smoke into the United States. In a Truth Social post, Trump claimed polluted air from hundreds of Canadian wildfires has blanketed major American cities and vowed to raise the issue with Canadian Prime Minister Mark Carney. The remarks come as nearly 900 wildfires burn across Canada, with many still out of control. The smoke has triggered hazardous air quality alerts across several US states, disrupted outdoor activities, and intensified political tensions between Washington and Ottawa.