The U.S. Supreme Court delivered a 6-3 ruling that blocks President Donald Trump’s use of a 1970s emergency powers law to impose widespread tariffs. Two-thirds of the justices are Republican appointees, with half nominated by Trump, yet the majority upheld constitutional limits on executive authority.
Immediate Effects Remain Limited
Sectoral tariffs on Canadian steel, aluminum, and other goods continue under separate legislation deemed constitutional. The administration indicates it can swiftly reimpose the struck-down tariffs through alternative measures.
Canada still confronts these targeted duties, alongside threats of new levies. Last month, Trump warned of tariffs on Canadian aircraft and a potential 100% tariff on all Canadian exports. Discussions persist about revising the United States-Mexico-Canada Agreement (USMCA).
Emerging Pushback in U.S. Politics
Signs of resistance surface within Trump’s own party. On February 11, six House Republicans joined Democrats to pass a resolution demanding an end to so-called fentanyl tariffs on Canada. Most Canadian goods remain exempt from broader tariffs, in line with USMCA provisions.
While the resolution faces a likely veto, it marks rare congressional independence. The U.S. Constitution assigns Congress control over taxation, including tariffs. With midterm elections approaching, Republicans express concerns over Trump’s policies and approval ratings impacting their seats.
Long-Term Judicial Independence
The Supreme Court’s lifetime-tenured justices demonstrate autonomy beyond political appointees. This conservative majority sets boundaries on executive tariff threats against any nation.
The decision reinforces U.S. rule of law, benefiting Canada amid ongoing trade tensions. While Trump holds nearly three years left in office, these developments signal potential moderation in protectionist policies.

