Ontario Threatens U.S. Critical-Mineral Supply as Trump Trade War Escalates

Highlights

• Ontario Premier Doug Ford put critical mineral exports 'on the table' as leverage against U.S. tariffs, citing high-grade nickel and uranium specifically.
• Canada exported C$28.8 billion in critical minerals to the U.S. in 2025 and supplies 43% of U.S. unwrought nickel imports and 25% of civilian uranium needs.
• Canada's rare earth exports remain commercially small at only C$7.1 million in 2025, limiting REE leverage despite strategic promise.
• The U.S.-Canada trade dispute hands China a strategic advantage by fracturing the integrated North American critical mineral supply network.

North America spent years arguing that critical minerals should come from friends. Now two of its closest friends are threatening each other with the supply chain. Ontario Premier Doug Ford says Canada should consider restricting critical minerals, electricity, oil, and potash if President Donald Trump escalates tariffs. The threat is real rhetoric, not yet policy: Ford specifically cited high-grade nickel and Ontario-processed uranium while declaring that “everything is on the table.” For investors, the larger story is dangerous: Washington’s attempt to reduce Chinese mineral dependence could be undermined by fracturing the integrated U.S.-Canadian resource network.

REEx Insight: China Can Watch From the Cheap Seats

This is the strategic contradiction of Great Powers Era 2.0™. China remains the dominant mineral-processing adversary, yet tariffs risk turning continental supply security into continental bargaining leverage.

Canada exported C$28.8 billion (approximately US$21 billion) of critical minerals to the U.S. in 2025. Canada is also a major supplier for 16 minerals where America has high import dependence.

That makes Ford’s threat more than political theater—but The Independent overstates (opens in a new tab) matters by loosely grouping “critical minerals.” Ontario cannot simply switch off every Canadian mine or shipment; jurisdiction, contracts, federal authority, and geography matter.

Nickel Today, Supply Architecture Tomorrow

Nickel deserves attention. Canada exported 98,199 tonnes of unwrought nickel in 2024, with 43% going to the United States. Uranium dependence runs deeper: Canada supplied roughly 25% of U.S. civilian-reactor uranium purchases in 2023. Rare earths, however, are different. Canada remains strategically promising but commercially small: its 2025 REE exports totaled only C$7.1 million. The lesson is larger than Ford versus Trump: resource nationalism does not stop at adversaries in Great Powers Era 2.0. Allies can weaponize interdependence too.