Congress’s Tariff Power After the Supreme Court Ruling

Last updated 4 days ago. Our resources are updated regularly but please keep in mind that links, programs, policies, and contact information do change.

The Supreme Court’s ruling says the International Emergency Economic Powers Act does not authorize presidential tariffs, the taxes charged on imports. Other laws Congress has passed still allow presidents to impose tariffs.

Congress can narrow those powers by rewriting the laws, but a president can veto the legislation. How much tariff authority presidents keep therefore depends on what Congress can turn into law.

The Supreme Court has already ruled

The Supreme Court decided Learning Resources, Inc. v. Trump on February 20, 2026. Its holding was that the International Emergency Economic Powers Act (IEEPA) does not authorize the president to impose tariffs.

The challenged tariffs addressed two declared emergencies: drug trafficking and trade deficits. The drug-trafficking tariffs covered imports from Canada, Mexico and China; the reciprocal tariffs applied to imports from trading partners worldwide.

The Supreme Court affirmed the judgment in the companion case, Trump v. V.O.S. Selections, Inc. It vacated the Learning Resources judgment and ordered that case dismissed for lack of jurisdiction. Those different procedural outcomes do not change the shared answer to the tariff question: IEEPA supplied no tariff authority.

Congress’s power and the president’s permission are different

Article I, Section 8 gives Congress the power to levy taxes and duties and to regulate commerce with foreign nations. The Supreme Court stated that the president has no inherent authority to impose tariffs during peacetime. For these tariffs, a presidential claim to authority therefore needs a basis in legislation.

Congress can delegate tariff-setting authority to the executive branch if it supplies an intelligible principle, a standard governing how the authority is used. The distinction is between Congress’s constitutional power and the permission it grants through a statute. A president exercising that permission has not acquired the constitutional power to write the tariff laws.

The Reciprocal Trade Agreements Act, signed on June 12, 1934, illustrates the bargain Congress can make. It temporarily authorized presidential tariff increases or decreases of up to 50 percent of the levels set by the 1930 Smoot-Hawley tariff, in exchange for concessions by other countries. The authority was subject to renewal after three years.

President Franklin Roosevelt had sought authority to negotiate reciprocal tariff reductions with other countries. That approach let the president bargain over rates within a boundary Congress had set.

Why the emergency law did not authorize tariffs

IEEPA allows presidential action against an unusual and extraordinary threat originating wholly or substantially outside the United States, when the president declares an emergency concerning that threat. The threat must concern national security, foreign policy or the economy, and the powers may be used only for that declared threat. Declaring an emergency addresses the trigger for using the law; it does not answer which responses the law permits.

The statute permits a range of controls over transactions involving foreign property interests, including regulating or prohibiting importation. The Court explained that tariffs differ from those regulatory controls because they raise Treasury revenue from domestic importers. Congress’s tariff delegations elsewhere use clear language and careful constraints; IEEPA did neither.

Chief Justice John Roberts and five other justices agreed on the result and the statutory reasoning supporting it. Roberts’s major-questions reasoning required clear congressional authorization for the sweeping tariff power claimed here. Only Justices Neil Gorsuch and Amy Coney Barrett joined Roberts’s principal opinion in full. Justice Elena Kagan, joined by Justices Sonia Sotomayor and Ketanji Brown Jackson, said ordinary statutory interpretation was enough and declined to join the major-questions reasoning.

Kagan’s opinion explained that Congress treats the power to regulate trade and the power to levy taxes as distinct. The agreement on IEEPA’s meaning was broader than the agreement on the doctrine needed to interpret it. The holding answers whether Congress granted this power in IEEPA; it does not decide whether a different grant would exceed constitutional limits on delegating lawmaking. For Congress, writing an express tariff grant and writing a constitutionally permissible grant are therefore separate questions.

Other tariff laws have their own limits

U.S. Customs and Border Protection (CBP) says duties under Sections 232, 301 and 201 remain applicable alongside the general duty rate. The emergency-tariff decision therefore does not make every import duty disappear. The surviving tools differ in what must happen before action and who must make the decision.

Under Section 232, the Secretary of Commerce conducts the national-security import investigation and consults the Secretary of Defense. The investigation report is due to the president within 270 days after the investigation begins, and it must advise the president if imports threaten to impair national security.

After receiving a report finding such a threat, the president has 90 days to decide whether to concur and, if concurring, determine the nature and duration of the import adjustment. If the president chooses action, the initial adjustment must be implemented within 15 days of that decision. Those deadlines start at different stages; the president’s decision clock does not begin when Commerce opens its investigation.

Section 301 gives the U.S. Trade Representative authority to act against foreign practices found unreasonable or discriminatory and burdensome to U.S. commerce, when action is appropriate. The Trade Representative may impose duties or other import restrictions, subject to any specific presidential direction.

Section 201 safeguards require an International Trade Commission investigation and a finding that increased imports substantially cause serious injury, or threaten it, to a domestic industry producing similar or directly competing goods. Available presidential responses include tariffs or limits on the quantity imported.

Section 122 addresses specified international payments problems, including large and serious U.S. balance-of-payments deficits or imminent significant depreciation of the dollar. The balance of payments records transactions between U.S. residents and the rest of the world, rather than just imports and exports of goods. A merchandise trade deficit alone therefore does not describe the full international-payments issue named in this law. Its temporary import surcharge cannot exceed 15 percent and lasts no more than 150 days unless Congress extends the period by law.

Changing the law takes votes, not just a court victory

Congress can seek to narrow presidential tariff authority by amending or repealing the statutes that grant it. Legislation that passes the House and Senate goes to the president for signature or veto. Overriding a veto requires approval by two-thirds of each chamber. A veto can therefore keep a tariff grant in force after both chambers have voted to change it. Congress’s constitutional power survives even when its votes fall short of changing the law.

The National Emergencies Act allows Congress to terminate a presidentially declared emergency through a joint resolution enacted into law. A joint resolution on that route must also survive presidential presentment and a possible veto. In INS v. Chadha, the Supreme Court rejected legislative vetoes that bypassed passage by both chambers and presentment to the president. A majority expressing opposition in Congress is therefore different from Congress enacting a law that changes the president’s authority.

IEEPA still requires consultation with Congress before its powers are used in every possible instance, regular consultation during their use and an immediate report when they are exercised. Follow-up reports are required at least once during each succeeding six-month period. Section 232 separately requires the president to explain initial action or inaction to Congress within 30 days of the determination.

The House Ways and Means Trade Subcommittee handles tariff and customs matters referred to its parent committee. The Senate Finance Committee’s jurisdiction includes tariffs, import quotas, reciprocal trade agreements and customs. These are institutional channels for scrutinizing delegated authority; reporting alone does not rewrite the underlying law.

One proposal would make approval the default

The Trade Review Act of 2025, S. 1272, had been introduced and referred to the Senate Finance Committee but had not passed the Senate. The bill’s official status record was checked on October 3, 2026. It is a proposal, not a rule importers or presidents already have to follow.

The bill would let presidential duties remain in effect for no more than 60 days unless an approval resolution is enacted into law. It would also allow duties to be ended by an enacted disapproval resolution, while excluding antidumping and countervailing duties from this mechanism. Requiring approval to continue a tariff would change the legislative starting point from trying to stop an existing measure to deciding whether to sustain it.

Antidumping duties address imports sold below fair value when the statutory injury conditions are met. Countervailing duties offset qualifying foreign-government subsidies, subject to the statute’s other conditions.

The refund question is different from the power question

The Supreme Court’s opinion did not address potential refunds of the IEEPA tariffs already collected. Its answer about presidential power therefore did not itself supply an importer’s refund procedure.

Import duties are legally the importer’s debt to the United States. Paying a customs broker does not discharge that debt if the broker fails to pay the government. The distinction helps explain why a ruling on import taxes does not automatically produce a refund to everyone who bought an affected product.

CBP says it refunds IEEPA duties only to the importer of record or the designated notify party with U.S. bank details in its Automated Commercial Environment (ACE) portal. It does not send direct refunds to consumers who may have paid higher prices because of those duties.

CBP’s refund system uses the ACE portal for importer or broker accounts, bank information and declarations requesting refunds. Consult the current CBP refund guidance for the entry categories and submission requirements that apply.

In its September 15, 2026 court filing, CBP planned to open Phase 3 on October 6 for finally liquidated entries covered by court-ordered reliquidation. Plaintiffs who submitted a valid importer-of-record number by July 30, 2026, would be able to file that day; CBP said it would give additional instructions to plaintiffs who submitted later. That is a limited path for court-covered entries, rather than an invitation for every importer to file in the new phase.

A September 17, 2026 Court of International Trade order required a CBP progress report on October 6 and scheduled a closed settlement conference for October 7. These are refund-administration proceedings in a different court from the Supreme Court case that decided IEEPA’s meaning.

Refund calculations leave the general duty rate and other applicable duties in place. For an importer, the question is which legal authority supported each charge; for Congress, it is which statutory authorities to leave in presidential hands. The court decision and the legislative choice operate at those different levels, even when they concern the same shipment.