This report presents an analysis of the recent trade shock between the United States and Canada, marking the most significant trade disruption in nearly a century. The document outlines the implications of increased tariffs, which have risen to nearly 11%, the highest since the 1940s, and discusses the potential recessionary impacts on the Canadian economy. The analysis indicates that sustained tariffs could lead to a significant reduction in Canadian GDP and an increase in unemployment rates. It also details the expected retaliatory measures from Canada and their asymmetric effects on the U.S. economy. The report highlights the vulnerabilities of the Canadian manufacturing sector, particularly in industries closely tied to U.S. trade, and discusses the broader economic ramifications, including inflationary pressures and the potential need for targeted fiscal and monetary policy responses. The document emphasizes the uncertainty surrounding the duration of the tariffs and the evolving nature of trade policies.