How the Supreme Court Transferred Tariff Power to Jamieson Greer

Introduction: a judicial earthquake at the heart of American trade policy

A ruling that shook the White House

On February 20, 2026, the Supreme Court of the United States issued a ruling that immediately upended the entire architecture of American trade policy. In the case known as Learning Resources v. Trump, the justices ruled that the International Emergency Economic Powers Act, or IEEPA, could not serve as the legal basis for the worldwide tariffs unilaterally imposed by President Donald Trump.

This ruling immediately invalidated roughly seventy percent of the tariffs imposed worldwide by the American administration since the start of its second term, forcing the White House to quickly find a new legal foundation to sustain its aggressive trade doctrine toward both partners and rivals.

An administration that refuses to abandon its doctrine

Far from resigning itself to this major judicial setback, the Trump administration reacted with remarkable speed, signaling within days of the ruling that it would actively seek other legal mechanisms to pursue its tariff policy, even if that meant taking narrower and more constrained legal routes.

I view this ruling from the Supreme Court as a necessary victory for American constitutional balance, even as I acknowledge that Trump remains, despite his excesses, a necessary evil for maintaining Western pressure on China during this tense geopolitical period.

The precise content of the Learning Resources v. Trump decision

A challenge initiated by small American businesses

The case originated from a challenge brought by several American companies, including Learning Resources, who argued that the IEEPA did not grant the president the authority to impose tariffs under an economic emergency declaration, and that even if such authority existed, it could not be as sweeping as the one claimed by the White House.

The Court of International Trade initially ruled that IEEPA did not authorize the tariffs imposed by Trump's executive orders, a decision subsequently upheld by the Court of Appeals for the Federal Circuit, before the administration brought the case before the Supreme Court.

The constitutional stakes raised by this case

Beyond the technical question of interpreting IEEPA, this case raised fundamental questions about the separation of powers and the so-called major questions doctrine, under which Congress must express any delegation of major economic and trade powers to the president clearly and explicitly.

The Supreme Court held that the provision allowing the president to "regulate" imports or exports during a national emergency did not implicitly include the power to impose tariffs, a reasoning that now seriously limits presidential latitude on trade matters.

I think this constitutional clarification, however embarrassing for the Trump administration, paradoxically strengthens the long-term credibility of American institutions in the eyes of our Western allies, who had sometimes sensed an imperial presidency on trade matters.

The Trump administration's swift counterattack

The immediate resort to Section 122

In the days following the Supreme Court's decision, the Trump administration quickly activated an alternative legal mechanism, Section 122 of the Trade Act of 1974, to impose a temporary ten percent worldwide tariff, which took effect on February 24, 2026.

This provision, historically rarely used, allows the president to impose temporary surcharges in response to major imbalances in the balance of payments, but it carries a strict legal limit: its application cannot exceed one hundred fifty days without an explicit extension voted by the American Congress.

A declaration of defiance owned by Greer

Just two days after the Court's ruling, US Trade Representative Jamieson Greer summarized the administration's position in a line that became emblematic: "The legal tool to apply it, that might change, but the policy hasn't changed." That statement, made on February 22, 2026, illustrated the White House's determination to maintain its trade doctrine despite the judicial defeat.

I find this quote from Greer revealing of a defining trait of this administration: no matter what the law says, the political objective stays fixed, and it then falls to the lawyers to find a legal path, however narrow, to get there.

The countdown to the July 2026 expiration

A strictly time-limited legal window

The temporary ten percent worldwide tariff imposed under Section 122 is set to expire at the end of July 2026, unless the American Congress votes an explicit extension, a politically uncertain scenario given the persistent tensions between the two chambers over the administration's trade policy.

This deadline is approaching fast, and several trade analysts are closely watching signals from Capitol Hill to determine whether a majority could actually form in favor of an extension, or whether the administration will once again have to improvise a new legal strategy.

The appeals still pending on the original IEEPA tariffs

Alongside this legislative race against the clock, several appeals proceedings related to the original tariffs imposed under IEEPA remained pending as of May 2026, adding yet another layer of legal uncertainty to an already considerably complex file.

I expect this persistent legal uncertainty to become the new normal for American trade policy under this presidency: every tariff win for the White House now seems doomed to be followed almost immediately by a judicial challenge.

The profile and rise of Jamieson Greer

A veteran of American protectionism

Jamieson Greer was confirmed as the twentieth US Trade Representative on February 27, 2025, bringing to the role considerable experience gained as chief of staff to Robert Lighthizer, the architect of the protectionist trade policy of Trump's first term.

This close relationship with Lighthizer allowed Greer to play an instrumental role in implementing tariffs against China as well as in negotiating the phase-one trade deal and the United States-Mexico-Canada Agreement, two files that shaped his reputation as an experienced and determined trade negotiator.

Power considerably expanded after the court ruling

Paradoxically, the judicial failure of the White House's IEEPA approach had the effect of considerably strengthening Jamieson Greer's institutional influence, since tariff authority now flows more directly through the Trade Representative's office rather than through a unilateral presidential declaration of economic emergency.

I note with some interest this institutional irony: in trying to limit unilateral presidential power, the Supreme Court unintentionally strengthened Greer's bureaucratic and diplomatic weight, who must now manage a trade policy that is both more complex and more institutionally anchored.

The new architecture of American tariff power

A shift in the center of gravity away from the Oval Office

Before this court ruling, the White House could unilaterally impose tariffs simply by declaring a national economic emergency, concentrating most trade power directly in the hands of the president and his immediate circle.

After the withdrawal of IEEPA as the primary legal basis, tariff authority now flows more directly through the Trade Representative's office, which must rely on more specific, better-regulated legal mechanisms that are often slower to activate than a simple presidential emergency declaration.

The new tools Greer now commands

Jamieson Greer now directly oversees authority under Section 122 as well as formal trade investigations, two legal instruments that require more rigorous technical and procedural preparation than simply invoking a national economic emergency.

I believe this increased procedural rigor, even if it slows certain decisions, ultimately produces a more predictable trade policy and therefore one more favorable to Western market confidence, a net gain despite the White House's short-term frustrations.

China, a constant target despite the change in legal tools

A strategic continuity openly acknowledged

Jamieson Greer has clearly signaled that China remains the top priority target of American trade policy, regardless of the specific legal tools used to enforce it, confirming that the change in legal vehicle represents no shift whatsoever in the fundamental strategic orientation toward Beijing.

This strategic continuity reassures Western allies worried about a possible easing of American pressure on China following the judicial setback, confirming that Washington remains determined to contain Chinese economic and technological expansion through every legal means available.

New mechanisms being considered to maintain the pressure

According to indications given by Greer himself, additional tariff hikes targeting Chinese goods could now come from existing trade agreements, new formal investigations, or alternative mechanisms such as service fees or quota systems, a diversification of tools that complicates Beijing's task of anticipating the next American move.

I think this diversification of tools, though legally more complex for the administration, actually amounts to a better long-term strategy against China, since it makes American trade policy more resilient to future judicial challenges.

The repercussions for international trade partners

An uncertainty that complicates allied planning

America's trade partners, including close allies like Canada, the European Union, and several Asian countries, must now contend with an American tariff architecture in constant flux, making it harder to plan their own long-term trade and industrial strategies.

This persistent uncertainty illustrates the collateral costs of the Trump administration's aggressive trade doctrine, where even court rulings favorable to easing American protectionism end up producing new forms of uncertainty rather than genuine, lasting clarity.

A negotiating opportunity for some skillful partners

Paradoxically, this period of legal transition also offers a window of opportunity to trade partners skillful enough to negotiate more favorable terms before new, more rigid tariff mechanisms settle durably under Greer's strengthened authority.

I advise all our Western allies, including Canada, to take advantage of this window of legal uncertainty to negotiate precise sectoral deals before Greer definitively consolidates his new post-IEEPA tariff architecture.

Political reactions in Washington to this power shift

A Congress split between relief and mistrust

Several members of the American Congress, particularly those concerned about the gradual erosion of their own constitutional authority over international trade, welcomed the Supreme Court's decision as a welcome reminder of the limits of unilateral executive power on trade matters.

Other lawmakers, more aligned with the Trump administration's protectionist agenda, are more worried about the added complexity this ruling imposes on the swift implementation of trade measures deemed necessary against Chinese economic competition.

A political battle set to continue as July approaches

As the July 2026 deadline for the expiration of the ten percent Section 122 tariff approaches, an intense political battle is brewing in Congress between those pushing for an extension and those who want to use this occasion to more firmly reassert legislative prerogatives over trade policy.

I expect a limping compromise rather than a definitive clarification, since neither Trump's supporters nor his opponents in Congress have a clear political interest in fully owning responsibility for such a controversial decision as election deadlines approach.

The concrete economic impact for American businesses

Importers still facing tariff uncertainty

American companies that import goods from abroad continue to face considerable tariff uncertainty, having to navigate between the currently active Section 122 tariffs, the appeals proceedings still pending on the old IEEPA tariffs, and the prospect of an upcoming expiration with no guarantee of a clear replacement.

This prolonged uncertainty weighs directly on the investment and supply chain planning decisions of many American businesses, which are struggling to build reliable forecasts in such a shifting regulatory environment.

Consumers absorbing part of the cost

Despite the administration's repeated arguments that tariffs strengthen American public finances, many independent economists continue to point out that these costs are largely passed on to American consumers themselves, in the form of higher prices for imported goods.

I remain convinced that this contradiction between the official rhetoric on tariff benefits and the reality experienced by American consumers will eventually become a major electoral issue, whatever the final legal outcome of this court battle.

The broader geopolitical dimension of this file

A signal sent to China, Russia, and Iran

Beyond purely domestic American legal considerations, this case sends an important geopolitical signal to strategic rivals like China, Russia, and Iran, who are closely watching the institutional capacity of the United States to maintain a coherent trade policy despite domestic judicial challenges.

This close scrutiny from our shared strategic adversaries underscores how important it is, for the entire Western bloc, to demonstrate enough institutional resilience so that these domestic judicial challenges are not perceived as a sign of overall strategic weakness.

An opportunity to strengthen coordination with Western allies

This period of legal transition could also represent an opportunity for the Trump administration and Representative Greer to strengthen trade coordination with Western allies, particularly on shared files related to Chinese economic and technological competition.

I think this institutional crisis, however embarrassing for Washington, could paradoxically strengthen Western cohesion if it pushes the administration to favor multilateral coordination over the pure tariff unilateralism that characterized the first months of this presidency.

The institutional lessons to draw from this judicial saga

The forceful return of American constitutional checks and balances

This judicial saga strikingly illustrates the persistent vitality of American constitutional checks and balances, demonstrating that even an administration determined to exercise maximum executive power on trade matters remains subject to real and effective judicial review from the federal court system.

This reaffirmation of constitutional limits, though politically embarrassing for the Trump administration, sends a reassuring long-term message about the soundness of American democratic institutions, an important strategic asset for the West's credibility against its authoritarian rivals.

An administration learning to navigate a more constrained legal framework

The speed with which the Trump administration identified and activated Section 122 as a legal alternative also demonstrates notable institutional adaptability, even though this adaptation comes at the cost of growing legal complexity and reduced trade predictability for all the economic partners involved.

I take away one simple lesson from this saga: American democratic institutions, despite their current internal tensions, retain a capacity for resilience and self-correction that our authoritarian rivals simply do not possess, and it is precisely that difference that should keep giving us confidence in the future of the West.

Historical precedents for the use of Section 122

A largely forgotten Nixon Shock in trade history

The last notable use of a mechanism comparable to Section 122 dates back to the Nixon Shock of 1971, when President Richard Nixon imposed a temporary import surcharge in response to a major monetary crisis, ending the dollar's convertibility into gold and redefining the international monetary order for decades.

This historical precedent, largely forgotten by the general public but well known to specialists in international trade law, shows that Section 122 was originally designed as an exceptional emergency tool, not as a routine trade-policy mechanism meant to work around other legal bases struck down by the courts.

A repurposed use according to several trade lawyers

Several specialized lawyers in international trade law believe the current use of Section 122 by the Trump administration represents a repurposing of its original intent, turning a tool designed for exceptional monetary crises into a convenient substitute for the IEEPA authority struck down by the Supreme Court.

This legal criticism, though technically well-founded according to several experts, has so far not produced any formal judicial challenge likely to conclude before the natural one-hundred-fifty-day deadline set by the law itself, leaving the debate largely theoretical for now.

I find it fascinating that the Trump administration had to reach back more than fifty years to find a precedent to legally justify its current trade policy, a telling sign of the lack of sufficiently robust modern tools to sustain such aggressive and prolonged protectionism.

The judiciary's role in American trade balance

A precedent that will shape future administrations

Beyond its immediate impact on the Trump administration, the Supreme Court's decision in the Learning Resources case establishes a lasting precedent that will also constrain future administrations, regardless of party, to respect stricter limits when seeking to invoke emergency economic powers to justify unilateral tariff measures.

This precedent structurally strengthens the American Congress's role as the ultimate arbiter of national trade policy, a development several constitutional scholars welcome as a return to the balance of powers intended by the drafters of the American Constitution.

A signal of institutional stability for international investors

This judicial clarification, despite the transitional period of uncertainty it caused, paradoxically sends a reassuring long-term signal to international investors, confirming that the American judicial system retains both the capacity and the will to contain potential excesses of executive power, even on highly sensitive economic matters.

This institutional soundness remains a considerable comparative advantage for the United States against rival political systems like China's, where no independent judicial challenge could ever call into question a trade decision made at the top of the executive branch.

I believe this American capacity for institutional self-correction, even when chaotic and embarrassing, remains one of the most underrated comparative advantages of the West against authoritarian regimes where no judicial check could ever produce a similar result.

Conclusion: reorganized tariff power, still contested

A judicial victory with limited practical consequences

The Supreme Court's decision in Learning Resources v. Trump undeniably represents a victory for constitutional separation-of-powers principles, but its practical consequences remain largely limited by the speed with which the Trump administration identified an alternative legal path through Section 122.

This reorganization of American tariff power, now concentrated more heavily in the hands of Jamieson Greer and his office, illustrates this administration's institutional adaptability in the face of judicial constraints, while keeping its strategic determination toward China and the West's other economic rivals fully intact.

A file to watch closely until the July deadline

The July 2026 deadline for the expiration of the ten percent tariff marks the next crucial milestone in this file, whose outcome will determine whether the American Congress chooses to reassert its constitutional authority over international trade or continue delegating considerable latitude to the executive branch, regardless of which administration is in power.

I'll close this narrative with a simple conviction: no matter which legal vehicle is chosen, American resolve to contain China will not weaken, and it is that strategic continuity, more than the legal mechanics themselves, that truly matters for the future of the West.

By Maxime Marquette, columnist

Columnist's transparency note

Who I am and my acknowledged biases

I sign my work as Maxime Marquette, columnist-analyst for mad-m.ca. I hold a pro-Western, firmly pro-Ukrainian editorial line, and I am critical of the authoritarian regimes of Russia, China, Iran, and North Korea. I view Donald Trump as a necessary evil for the West, a position that never stops me from objectively analyzing the internal institutional tensions his trade policy provokes within the United States.

My method consists of systematically cross-checking multiple reputable journalistic, legal, and institutional sources before advancing any claim, always keeping my personal opinions, flagged in italics, separate from sourced and dated factual data.

What I don't know

I don't know with certainty whether the American Congress will extend the Section 122 tariff beyond July 2026, nor how all the appeals proceedings still pending on the original IEEPA tariffs will ultimately conclude. I invent no testimony, no anonymous source, no scene to which I did not have direct access through public and verifiable documents.

Sources

Primary sources

Supreme Court ruling shifts US tariff power to Trade Representative Jamieson Greer — KuCoin News, June 28, 2026

Learning Resources, Inc. v. Trump — Supreme Court Bulletin, Cornell Law School, 2026

Secondary sources

Trump's economic agenda and the Supreme Court tariff ruling — Axios, June 30, 2026

What the Supreme Court tariff ruling means for US trade policy — Foreign Policy, July 2026

US launches new Chinese tech crackdown, will ban some imports — Reuters, June 26, 2026

The Guardian International — ongoing coverage of American trade policy, June 2026