Canada Plans Retaliatory Tariffs Against U.S. as Trade Dispute Intensifies

Canadian Prime Minister Mark Carney has signaled that Ottawa will not back down. The dispute comes amid heightened political friction between the two allies, with Canadian lawmakers accusing the United States of abandoning longstanding trade norms.

The U.S. duties rest on a legal foundation that critics call untested. Legal scholars note that Section 338 has rarely been invoked and has never been the subject of a definitive ruling by U.S. courts on its compatibility with modern trade commitments.

Economic Stakes for Both Sides

In February, the U.S. Supreme Court struck down a separate set of tariffs imposed under different authority, narrowing the legal tools available to the White House. The administration subsequently turned to Section 338 to pursue duties on countries it accuses of unfair trade practices.

Industry groups in both countries have warned of higher costs for consumers. Canadian exporters of lumber, steel, and agricultural products are expected to be among the most exposed, while U.S. manufacturers fear disruption to integrated supply chains.

The dispute has also spilled into the political arena. Opposition voices in Canada have pressed the government to adopt a more confrontational stance, while some U.S. business leaders have urged the administration to pursue negotiated solutions instead of escalating tariffs.

Outlook for Negotiations

Analysts say the tariff exchange could weigh on North American economic growth if it persists. Both economies remain highly integrated, and prolonged duties typically feed into consumer prices within several months.

Ottawa has indicated that it is prepared to expand the list of targeted U.S. goods if the dispute is not resolved. Negotiations through traditional channels, including the U.S.-Mexico-Canada Agreement framework, have so far failed to produce a settlement.

The broader backdrop includes ongoing uncertainty over the future of North American trade architecture. With several provisions of the USMCA scheduled for review, the current confrontation risks complicating those talks and hardening positions on both sides of the border.

Canadian officials have emphasized that the retaliatory measures will remain in place until the U.S. lifts the Section 338 duties. Until then, businesses on both sides are bracing for continued volatility in cross-border trade.