Trade war escalates after U.S.-Canada negotiations collapse

# Why This Matters The breakdown of U.S.-Canada trade negotiations represents a critical inflection point for North American economic integration, threatening to unwind decades of deeply interwoven supply chains that span automotive manufacturing, agriculture, energy, and technology sectors. A full-scale trade war between the two countries would directly increase consumer prices on everything from groceries to vehicles in both nations, while forcing manufacturers to choose between absorbing tariff costs or relocating operations—a process that could take years and leave hundreds of thousands of workers displaced. Beyond immediate economic pain, the collapse signals a fundamental shift in how the U.S. conducts trade policy through executive action and social media rather than institutional negotiation, setting a precedent that erodes the predictability multinational companies and investors depend on for long-term planning. For Canada specifically, retaliation options are limited given its economic size relative to the U.S., meaning the country faces either capitulating to unfavorable terms or enduring sustained damage to key export industries that anchor regional economies.