Overview
- The Trump administration put 50 percent duties into force on hundreds of Canadian product categories, which took effect Saturday and cover roughly $20–28 billion in exports.
- Prime Minister Mark Carney halted talks, recalled negotiators and promised matching retaliatory tariffs that the government says will begin on Sept. 8.
- Carney called the U.S. move an attack and said last‑minute U.S. demands on culture, auto rules and Canada’s ability to strike other trade deals prompted Canada to walk away.
- President Trump escalated rhetoric and announced plans to extend 50 percent rates to autos and steel in January 2027, increasing political pressure in U.S. swing states.
- Economists and business groups warn higher consumer prices and strained North American supply chains, and officials expect legal challenges because Washington used rare Section 338 authority.