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As of early 2026, Canada remains the largest foreign supplier of steel, aluminum, and uranium to the United States, according to U.S. Geological Survey and International Trade Commission data. The Pentagon is increasing investments to secure supply chains for 34 critical minerals from Canada, leveraging initiatives like the Defense Production Act and partnerships with Canadian firms. Additionally, the Office of Information and Regulatory Affairs has approved rulemaking to modernize regulations for transporting hazardous materials related to U.S. space operations.