Trump tariffs dealt major blow as US appeals court rules most levies illegal

Trump tariffs dealt major blow as US appeals court rules most levies illegal
31 August 2025 Arjun Rao

A sweeping court rebuke, a looming Supreme Court fight

A federal appeals court has delivered the sharpest legal rebuke yet to the White House’s power over trade, ruling 7-4 that most of the Trump tariffs were unlawful because the president cannot use emergency powers to impose broad, peacetime levies. The decision by the U.S. Court of Appeals for the Federal Circuit wrestles tariff authority back toward Congress, saying the Constitution lodges that power with lawmakers and any delegation to the executive must be explicit and tightly confined.

The case centered on Donald Trump’s use of the International Emergency Economic Powers Act (IEEPA) of 1977 to levy duties after declaring national emergencies tied to trade deficits and drug trafficking. The majority said IEEPA—long used for sanctions, asset freezes, and financial restrictions—doesn’t mention tariffs and lacks the procedural guardrails Congress typically sets when handing over taxing or trade tools. In short: the statute can’t stretch to cover a tariff regime that reaches across major trading partners including China, Canada, Mexico, and India.

While the ruling marks a landmark separation-of-powers moment, it won’t change prices at checkout overnight. The court kept the tariffs in place for now, granting the government time to appeal. That delay blunts immediate disruption but sets up a fast-track legal collision likely to land before the Supreme Court, given the stakes for both constitutional design and the global trading system.

The timing is brutal for the administration’s trade agenda. Treasury Secretary Scott Bessent had been targeting an early-September window—Labor Day—for closing out a new round of talks triggered by the tariff push. With the legal basis now undercut, negotiating partners have little reason to cut deals while the core policy may be struck down for good.

Democrats on Capitol Hill cheered the ruling, arguing it vindicates years of warnings about presidential overreach in trade. Senator Ron Wyden, a senior voice on trade oversight, praised the decision as a course correction. Business groups and consumer advocates—who have complained about higher costs and supply chain whiplash—welcomed the clarity, while some manufacturers and unions that liked the tough stance on imports are urging Congress to craft a new, narrower tool that targets bad actors without blowing past constitutional limits.

What the court decided—and what happens next

The majority opinion draws a firm line: tariffs are not a catch-all instrument that the president can summon under emergency law. IEEPA was designed during the Cold War to help presidents move quickly against hostile actors by freezing assets and restricting transactions, often in sanctions contexts. It was not, the court said, a back door to rewrite the tariff schedule.

Three pillars underpinned the decision:

  • Constitutional text and history: The power to tax and set duties resides with Congress. Any delegation of that power must be explicit and narrow.
  • Statutory silence: IEEPA does not mention tariffs, customs duties, or changes to import schedules—the bread and butter of trade law.
  • Guardrails matter: When Congress has allowed presidential tariff action—think Section 232 for national security or Section 301 for unfair trade—it included procedures, timelines, and evidentiary standards. IEEPA lacks those trade-specific guardrails.

Not every duty is affected. The ruling targets the “Reciprocal Tariffs” and “Trafficking Tariffs” imposed through the emergency framework. Tariffs justified under other statutes remain intact unless separately challenged. In practice, that means companies and customs brokers will still face today's rates while the legal fight moves up the ladder.

The opinion also nods to a broader doctrine familiar to constitutional lawyers: big policy changes that rework the economy need clear congressional approval. It’s the same instinct behind recent decisions that pared back executive branch leverage when agencies tried to stretch older laws to new ends. The message to the White House—any White House—is simple: if you want to rewrite trade terms at scale, get Congress on board.

For trade partners, the split-screen is confusing. On paper, the tariffs remain for now. In practice, counterparties can slow-walk negotiations and wait the courts out. Without solid legal footing, the U.S. loses bargaining leverage; partners know the duties could evaporate if the Supreme Court affirms.

Markets and businesses have learned to live with uncertainty, but the costs add up. Retailers and import-heavy sectors had built pricing strategies around the tariffs. Manufacturers relying on foreign inputs adjusted supply chains. Farmers absorbed retaliatory measures that narrowed export markets. A ruling like this doesn’t instantly unwind those choices; instead, it adds another layer of “maybe.” If the tariffs fall, do firms reconfigure logistics again? If they stay, do they lock in long-term contracts at tariff-era prices?

Here’s how the next phase could unfold:

  • Appeal and stay: The government seeks Supreme Court review while the current duties remain in force, avoiding immediate shocks at ports and warehouses.
  • Emergency posture: The administration argues that broad economic and security concerns justify flexibility. Expect a hard sell: the appeals court was clear that IEEPA isn’t a general-purpose trade tool.
  • Congressional calculus: Lawmakers face pressure to clarify trade authorities. Some will push for new, targeted tariff powers tied to supply-chain resilience or critical technology. Others will insist on tighter limits to prevent future overreach.
  • Business triage: Importers and exporters hedge with diversified suppliers, short-term contracts, and contingency pricing to ride out the legal timeline.

Politically, the ruling slices into the heart of the policy that the former president branded “Liberation Day,” which sparked five months of tit-for-tat actions across major economies. Supporters hailed it as long overdue leverage to reset trade relationships. Critics called it a self-inflicted tax on American consumers. The court essentially sidestepped the policy debate and focused on the “who decides” question—Congress or the president—landing squarely on the side of legislative primacy.

On the ground, consumers felt the squeeze. Electronics, appliances, and everyday goods imported from affected countries rose in price. Some companies ate part of the cost to keep customers, trimming margins; others passed it on. Studies by retail and manufacturing associations documented double-digit increases in certain product categories during the tariff window, especially where domestic substitutes were limited.

Still, not everyone wants an abrupt unwind. Manufacturers facing global overcapacity and unfair subsidies want tools to level the field. Labor groups that saw reshoring momentum fear that taking tariffs off the table entirely could dull that edge. Their argument to Congress: build a legal framework that targets predatory practices, punishes transshipment, and protects critical sectors without detonating the constitutional boundary.

Internationally, the ruling will be read as a signal that U.S. economic policy is returning to process, not personality. Trade partners that matched U.S. duties with their own could reassess. Some may dial back reciprocity to stabilize prices; others might hold firm until the Supreme Court speaks. Either way, legal clarity tends to lower risk premiums, and that could encourage stalled investment plans if a durable policy path emerges.

A few practical takeaways for businesses and investors:

  • Compliance status quo: Keep following current tariff schedules until court orders change. The stay keeps customs protocols intact.
  • Contract flexibility: Favor clauses that account for tariff reversals or rate shifts within the appeal timeline.
  • Supply-chain hedging: Maintain alternative sourcing routes in case rates snap back or vanish after a Supreme Court ruling.
  • Watch Congress: If bipartisan talks open on a narrow, modern tariff tool, it could move quickly, especially if paired with domestic manufacturing incentives.

The court’s opinion also revives an old civics lesson: separation of powers isn’t a technicality—it’s a design choice with real-world consequences. When Congress doesn’t clearly hand over a powerful tool like tariffs, courts are reluctant to let presidents improvise. That doesn’t freeze U.S. trade policy; it channelizes it. If the country wants to play hardball on trade, it can, but the bat has to be carved by Congress.

For now, the legal scoreboard reads: presidential emergency powers cannot carry broad tariff schemes that reshape U.S. trade without congressional say-so. The tariffs stay during appeal, negotiations slow, businesses hedge, and all eyes shift to the Supreme Court and Capitol Hill. The outcome will define not just the fate of one tariff program, but the contours of executive economic power for years to come.

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