Story Highlights
- The Court of International Trade ruled 2-1 that Trump’s 10 percent global tariffs were “invalid” and “unauthorized by law,” finding the president overstepped the tariff power that Congress had provided under existing legislation.
- This decision comes after the Supreme Court’s February 2026 ruling that struck down Trump’s original tariff scheme by a 6-3 vote, finding the tariffs exceeded emergency powers granted under the International Emergency Economic Powers Act of 1977.
- The recurring judicial defeats raise critical questions about whether the Trump administration possesses sufficient statutory authority to maintain any tariff regime, or whether tariff policy has become a matter that requires explicit congressional action.
What Happened
On May 7, 2026, a split three-judge panel of the Court of International Trade in New York ruled that the 10 percent global tariffs the Trump administration had imposed after the Supreme Court’s February loss were illegal. The court ruled 2-1 that Trump overstepped the tariff power that Congress had allowed the president under the law, declaring the tariffs “invalid” and “unauthorized by law.” The decision followed a lawsuit by small business organizations challenging the tariffs as an unconstitutional exercise of executive authority.
The Supreme Court had previously struck down Trump’s original sweeping tariffs by a vote of 6-3, ruling that the tariffs exceeded the powers given to the president by Congress under a 1977 law providing him the authority to regulate commerce during national emergencies created by foreign threats. Rather than accept that defeat and seek congressional authorization for new tariffs, the Trump administration attempted to reimpose tariffs under a different legal framework. The new 10 percent global tariffs were presented as an alternative to the invalidated emergency tariffs, utilizing different statutory authorities that the administration believed would withstand judicial scrutiny.
The Trump administration’s strategy of pivoting to alternative legal authorities after losing at the Supreme Court reflected a broader pattern of attempting to circumvent judicial limitations on executive power. On May 7, 2026, the Court of International Trade ruled against the Section 122 tariffs, though the decision is under appeal and tariffs continue to be collected. Unless extended by Congress, the Section 122 authority will expire on July 24, 2026. Despite multiple legal rulings challenging the statutory authorities used to construct this tariff regime, the administration has remained committed to maintaining a broad protectionist “tariff wall.” The determination to maintain tariffs despite consistent judicial defeats suggested that the administration viewed the tariff regime as essential to its policy agenda, regardless of legal obstacles.
Judge George Carro, writing for the majority, explained that Congress had not delegated sufficient authority to the president to impose such sweeping tariffs. The judge emphasized that the statutory provisions Trump cited contained specific limitations on the president’s tariff authority, and that imposing a blanket 10 percent tariff on all global imports exceeded those carefully defined limits. The majority opinion noted that if the president possessed the authority Trump claimed, it would render meaningless Congress’s constitutional role in regulating interstate and international commerce.
The dissenting judge argued that the statutory language provided the president with sufficient flexibility to impose the tariffs as an exercise of authority delegated by Congress. The dissent argued that in the modern administrative state, broad delegations of power to the executive are routine and necessary for effective governance. However, the two-judge majority disagreed, finding that even modern administrative law recognizes limits to executive power when fundamental economic policy is at stake.
Why It Matters
The Court of International Trade’s decision raises fundamental constitutional questions about the separation of powers and whether the executive branch can unilaterally exercise powers that the Constitution explicitly assigns to Congress. Article I of the Constitution grants Congress the power to regulate international commerce and impose tariffs. Throughout American history, tariff policy has been treated as a quintessentially legislative function, requiring congressional action to implement. When Trump attempted to impose tariffs through executive order, he effectively claimed executive authority over a matter that the Constitution treats as exclusively congressional.
The repeated judicial defeats suggest that the constitutional separation of powers may impose meaningful limits on executive tariff authority, at least in the current legal climate. Multiple federal courts have now concluded that Trump lacks unilateral authority to impose broad tariffs without explicit congressional authorization. This represents a significant assertion of judicial power to review and limit executive action in the economic realm. Prior to Trump’s presidency, the scope of executive tariff authority had rarely been tested in court, leaving ambiguity about whether the separation of powers imposed real constraints on presidential power in this domain.
The implications extend beyond tariffs to the broader question of executive emergency power. Trump relied on the International Emergency Economic Powers Act, a statute enacted during the Cold War that grants the president broad authority during declared national emergencies. The Supreme Court’s February 2026 ruling that the statute does not authorize tariffs significantly limits the scope of emergency power available to any president. Future administrations confronting genuine national emergencies may find their emergency powers curtailed by the precedent that courts will narrowly construe emergency statutes.
The Trump administration’s reaction to these judicial defeats has been to continue collecting tariffs pending appeal, effectively ignoring lower court rulings while the legal process continues. This approach reflects administration confidence that the Supreme Court’s conservative majority might ultimately uphold tariff authority on some legal theory, despite the Supreme Court’s February ruling. However, the administration’s experience suggests that constitutional limits on executive power may prove more durable than critics of judicial review have sometimes argued.
Economic and Global Context
The 2026 Trump tariffs amount to an average tax increase per US household of $1,500 in 2026, and represent the largest US tax increase as a percent of GDP since 1993. These tariffs have not meaningfully altered the trade deficit. The economic burden of tariffs has fallen primarily on American consumers and businesses that rely on imported goods. Economists have noted that tariffs function as a tax on imports, ultimately raising prices for American consumers without producing the claimed benefits of reducing the trade deficit or increasing manufacturing investment.
Globally, the tariff conflicts have created uncertainty in international trade relationships. European leaders initially responded to Trump’s tariff threats with alarm, though many have subsequently adapted to the new tariff regime through negotiated deals. The lack of a final resolution on tariff policy has prevented the global economy from fully adjusting to the new trade environment. Businesses requiring long-term planning cannot determine what tariff rates will apply to their products in the future, creating investment uncertainty.
The tariff disputes have also affected relations with traditional American allies. Canada, Mexico, and European Union nations have imposed retaliatory tariffs on American exports, reducing demand for American agricultural products and manufactured goods. These counter-tariffs have proven politically damaging in agricultural states that have traditionally supported Republican candidates, creating tension within the Republican coalition between trade protectionists and free trade advocates.
Implications
The Court of International Trade’s decision suggests that the Trump administration’s tariff ambitions face significant legal obstacles that may require congressional action to overcome. If tariff authority truly rests with Congress, the administration would need to negotiate with the legislative branch to secure authority for tariffs beyond those authorized under existing statutes. However, controlling both the House and Senate, Republicans might theoretically secure such authority through legislation, though passing tax increases on American consumers would face political resistance.
The ongoing legal battles over tariffs will likely continue to reach the Supreme Court as cases proceed through the appeals process. The Court’s conservative majority has shown some willingness to limit executive emergency power, but the extent to which the Court will constrain executive tariff authority remains unclear. A definitive Supreme Court ruling on tariff authority could establish either broad executive power or significant congressional limits, fundamentally affecting how tariff policy operates in the future.
For businesses and consumers, the uncertainty about tariff policy remains a significant impediment to economic planning. Until the courts and Congress definitively resolve tariff authority, American companies cannot confidently project future import costs. Global trading partners likewise face uncertainty about whether current tariff agreements will endure or whether new administrations might reimpose tariffs through alternative legal theories. The constitutional questions at stake in the tariff disputes therefore have profound practical consequences for the American economy and international trade relationships.
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