Americans are increasingly opposed to President Donald Trump's trade and tariff policies, while Canadians broadly support retaliatory measures despite facing a larger economic shock relative to the size of their economy. The Silver Bulletin, aggregating more than 20 polls conducted this summer, found that 58.7% of Americans disapprove of Trump's approach to trade and tariffs, compared with 34.5% who approve. That disapproval gap of more than 24 points represents a swing of over 18 percentage points since the start of Trump's second term. A YouGov survey found 64% disapproval and 30% approval, while 62% of respondents in a survey by The Argument said tariffs were worsening the cost of living. In Canada, an Angus Reid Institute poll found 76% supported ending trade talks and 62% considered counter-tariffs appropriate. The political divide is emerging as the administration uses Section 338 of the Tariff Act of 1930 to impose a 50% levy on C$20 billion of Canadian imports, despite the provision never having been used by a president or tested in court. Legal experts disagree over whether later trade laws superseded the statute and whether the administration demonstrated measurable harm or targeted goods connected to alleged discrimination. No lawsuit has yet been filed, although the Liberty Justice Center is seeking plaintiffs. The dispute is raising costs for vehicles, housing materials and alcohol, clouding the future of the USMCA and complicating integrated North American supply chains. The administration is also considering an additional 7.5% tariff on China tied to industrial overcapacity before a planned late-September meeting between President Donald Trump and Chinese President Xi Jinping. That would add to China's 26% effective statutory tariff rate, according to the Yale Budget Lab. Raymond James analysts said the United States has not yet reached peak tariff levels.