U.S. Trade Representative Jamieson Greer testified to Congress on April 22, 2026 that Canada is 'doubling down on globalization' through PM Mark Carney's push to diversify trade partnerships—a strategy at odds with the Trump administration's goal to restrict North American trade to curb China's access to the market. Greer threatened enforcement action over provincial alcohol bans and signaled the U.S. may reject the current CUSMA renewal by July 1 unless Canada strengthens rules preventing third-country goods from entering tariff-free. Carney responded that Canada won't make additional concessions and that trade negotiations should be mutual, not dictated by Washington, though he's already under fire from Trump officials for seeking closer ties with China to reduce U.S. dependence.