President Donald Trump announced new 50% tariffs on a range of Canadian goods, saying the United States is being harmed by smoke from wildfires in Canada. In a Truth Social post on Friday, he wrote that Canada had failed to maintain its forests and that the resulting polluted air was dangerous and unacceptable. He said the cost of the pollution should be added to tariffs Canada is paying. Trump told reporters that he raised the issue with Prime Minister Mark Carney during the FIFA World Cup finals in New Jersey, urging Carney to stop the fires and suggesting Canada could pay damages or face tariffs. An official told CNBC that the new tariffs are separate from plans to increase trade taxes in response to the wildfires. Republican lawmakers in the United States have proposed additional measures, including legislation that would impose sanctions on Canada and a potential pullback of U.S. assistance for Canadian firefighting efforts. Michigan Representative John James said he would introduce a bill, while Ohio Senator Bernie Moreno and Montana Representative Tim Sheehy offered similar proposals. Sheehy accused Canada of managing firefighting like a Chinese protection racket, a phrase echoed by Trump. Ontario Premier Doug Ford has suggested a proportional response, calling for tariff for tariff, dollar for dollar. Before this dispute, the administration had engaged in a series of trade disputes with Canada, including earlier tariffs on aluminum and steel. The current escalation has led to boycotts of U.S. whiskey, reduced Canadian tourism, and a Canadian plan to increase exports of electric vehicles to China and develop pipelines to Asian markets. Trump has previously promoted prescribed burning as a solution for wildfires, citing its use in California, but has not addressed the role of climate change, which scientists say intensifies drought and temperature conditions that drive fire frequency. His administration has described climate change as a hoax and has not implemented policies to reduce greenhouse gas emissions. The situation remains unresolved, with the United States threatening further tariffs and other economic measures while Canada prepares a retaliatory response.