ANALYSIS: The Supreme Court Invalidates Trump Tariffs — A Fragmented Constitutional Victory

Introduction: When the Supreme Court Says No to IEEPA

February 20, 2026 and the decision that changed everything

On February 20, 2026, the United States Supreme Court rendered a decision of 6 votes to 3 that shook the Trump administration's trade policy: in the case of Learning Resources, Inc. v. Trump, the majority ruled that the International Emergency Economic Powers Act (IEEPA) did not authorize the president to impose tariffs. In a few densely reasoned words of constitutional argument, the justices had just invalidated the legal basis for the "universal" tariffs that Trump had deployed since early 2025 on almost all American imports. It was the thunderclap many had been waiting for, and which still surprised by its clarity.

The unusual majority in this decision deserves to be highlighted: Chief Justice Roberts, joined by Justices Gorsuch and Barrett — all three appointed by Republican presidents — joined the three liberal justices to form the coalition of six. This is not a partisan decision in the traditional sense. It is a constitutional decision that transcended the usual ideological lines. And this fact, more than any other, signals the depth of the underlying legal reasoning.

The majority's reasoning: Congress cannot delegate fiscal power

The core of the Supreme Court's reasoning rests on two pillars. First, the US Constitution explicitly assigns the power of taxation to Congress — not the executive. Tariffs are taxes. Therefore tariffs belong to Congress. Second, the word "regulate" in IEEPA — the only word on which the Trump administration relied to justify the tariffs — does not include the power to raise revenue. To regulate means to control, to frame, to direct. It does not mean to tax.

The Court also applied the "major questions" doctrine — a legal principle establishing that when a public policy decision has extraordinary economic and political importance, Congress must have authorized that decision explicitly, not implicitly. Imposing tariffs that have reshaped the entire structure of American trade is unquestionably a major question. Yet IEEPA contains no explicit authorization for tariffs. The Court's reasoning is rigorous. It is also potentially unsettling for many future presidents who will want to use IEEPA.

IEEPA: A 1977 Law Used Far Beyond Its Original Intent

The history of a law designed for emergencies, not commerce

The International Emergency Economic Powers Act was adopted by the US Congress in 1977 under President Carter. Its original purpose: to give the president emergency tools to respond rapidly to national security threats of foreign origin — freeze assets, block financial transactions, control sensitive exports. Since 1977, IEEPA has been used dozens of times by successive presidents to impose targeted economic sanctions on specific countries or entities.

What Trump did with IEEPA in 2025 is qualitatively different from all previous uses: he used the law to impose universal tariffs hitting all American imports, invoking the national economic emergency of the United States' chronic trade deficits. This is a considerable conceptual leap — transforming an emergency tool into a global structural trade policy. The question the Supreme Court ruled on: is this leap legally permitted by the law? The answer was no.

The major questions doctrine: a limit on executive power

The major questions doctrine, developed by the Supreme Court in several recent decisions, has become one of the most important legal tools for limiting executive power expansion. Its principle: when the executive makes a decision of extraordinary economic and social scope by relying on an old law with vague formulations, the Court requires a clear and explicit congressional authorization before validating that decision.

The decision of February 20, 2026 applies this principle directly to IEEPA tariffs. The Trump administration argued that trade deficits constituted a national emergency justifying the use of IEEPA. The Court responded: even admitting that an emergency existed, using IEEPA to impose tariffs at global scale is a major question requiring explicit congressional authorization — authorization that the 1977 law does not contain. This was reasoning that closed the door fairly definitively.

Trump's Response: Section 122, 10%, Then 15% in 24 Hours

An immediate pivot to a new legal basis

The Trump administration's response to the February 20 decision was immediate and characteristic: that same day, Trump invoked Section 122 of the Trade Act of 1974 to maintain 10% tariffs on all global imports. The next day, February 21, via a message on Truth Social, he raised this tariff to the maximum legally permitted by Section 122: 15%. Two global trade policy decisions in less than 48 hours, the second via publication on a social network. This is American economic governance in 2026.

Section 122 is a provision of the 1974 Trade Act that authorizes the president to impose emergency tariffs of up to 15% for a maximum duration of 150 days when the United States faces "large and serious" balance of payments deficits. This provision is rarely used — before Trump, it had been invoked only once, briefly, under Nixon in 1971. Its application in the economic context of 2026, where deficits exist but are the result of complex trade dynamics rather than an acute balance of payments crisis, immediately raised legal questions.

The timer: 150 days, and then?

Section 122 is explicitly limited to 150 days. Invoked on February 20, it theoretically expires on July 24, 2026. An extension beyond 150 days requires a Congressional vote — which the Trump administration is not certain to obtain, even with a Republican majority in both chambers. Several Republican senators representing agricultural or manufacturing states exposed to foreign counter-tariffs have expressed deep reservations about tariffs as policy.

This time constraint creates genuine economic uncertainty. American companies that import goods or that sell in countries that have imposed counter-tariffs in response to Trump tariffs do not know what July 25 will bring. This uncertainty has a cost: it delays investment decisions, complicates supply chain planning, and generates risk premiums on international commercial transactions. Regulatory instability has an economic price, even if this price is difficult to quantify precisely.

The Court of International Trade: A Second Invalidation, More Nuanced

May 7, 2026: Section 122 also invalidated for plaintiffs

On May 7, 2026, the Court of International Trade (CIT) rendered a 2-1 decision that further complicated the picture: it ruled that Section 122 tariffs were also illegal in the current economic context. The tribunal's reasoning: Section 122 requires the existence of "large and serious" balance of payments deficits as a prerequisite. According to the Court, the current economic conditions of the United States do not satisfy this legal criterion — the United States has trade deficits, but not the type of balance of payments crisis Section 122 was designed to address.

However, the CIT's injunction has limited scope: it applies only to the specific plaintiffs in this case — the state of Washington, the companies Burlap & Barrel and Basic Fun. For all other American companies, Section 122 tariffs remain in force pending appeal. This is a legally important decision — it signals that other courts could invalidate Section 122 for other plaintiffs — but its immediate impact is limited. The Trump administration's tariff policy continues to apply to all imports for the vast majority of businesses.

The legal battle that is not over

The Section 122 case is now on the path of an appeal before the Court of Appeals for the Federal Circuit, then potentially before the Supreme Court again. This legal battle will take time — probably more time than Section 122's 150 days themselves. In the meantime, the administration will seek additional alternatives.

Trade experts identify several tools Trump could use if Section 122 is definitively invalidated: Section 232 (national security threats, not affected by the IEEPA decision), Section 301 (unfair trade practices, longer procedures but stronger legal basis), and an Act of Congress that would explicitly grant him the power the Court judged absent in IEEPA. This last option is politically uncertain but legally the most robust.

The Threat of 100% Tariffs on Digital Taxes

June 26, 2026: a new escalation with global implications

On June 26, 2026, in the midst of the Section 122 legal battle, the Trump administration launched a new tariff threat: 100% tariffs on imports from countries applying digital services taxes (DST) targeting American tech companies. This announcement — reported by CNBC that same day — added a new front to an already complex trade war.

Digital services taxes exist in more than 12 countries, mainly in Europe. Their logic: American tech giants — Google, Meta, Apple, Amazon — generate substantial revenues in these countries without having a sufficient physical presence there to trigger normal corporate taxes. DSTs attempt to offset what these governments perceive as structural tax avoidance by American digital multinationals. The economic logic is debatable but comprehensible. The American response — 100% tariffs — is radical.

The legal ambiguity of this new 100% tariff

A striking element reported by CNBC on June 26: the legal basis for 100% tariffs on digital taxes is uncertain. With IEEPA invalidated and Section 122 under judicial pressure, the administration will need to justify this new measure on another basis. Section 301 investigations are apparently underway — Section 301 allows retaliatory tariffs against foreign trade practices deemed unfair. But Section 301 procedures are typically longer and require formal investigations before tariff imposition.

Canada retreated on its own digital tax last year under American pressure. The United Kingdom is defending its own in June 2026. The European Union, with several members having DSTs, is in a delicate position: yielding would mean abandoning a sovereign fiscal tool under American pressure, but maintaining DSTs in the face of American 100% tariffs would impose considerable economic costs on European exporters. This is precisely the kind of asymmetric pressure that the Trump administration uses effectively.

Section 232 Tariffs: The Exception That Withstands the Courts

Steel, aluminum, semiconductors: national security as a shield

A crucial element that many analyses of the IEEPA tariff legal battle have overlooked: tariffs imposed on the basis of Section 232 — the national security provision — were not affected by the IEEPA decision. This section, used by Trump since his first term for tariffs on steel (25%) and aluminum (10%), rests on a different legal basis and has already survived several legal challenges. It also applies to tariffs on semiconductors and certain defense equipment.

The scope of Section 232 tariffs is less broad than universal IEEPA tariffs — they cover specific sectors rather than all imports. But they are more legally durable. And they constitute, alongside Section 301, the core of what the Trump administration can maintain long-term, regardless of the outcome of the legal battle over IEEPA and Section 122.

What Section 232 tariffs signal about American industrial policy

The use of Section 232 reveals the underlying industrial vision of Trump's trade policy: the United States needs domestic manufacturing capacity in strategic sectors — steel, aluminum, semiconductors — regardless of the absolute level of economic efficiency that production in these sectors would represent. This is an industrial policy vision that contrasts with the neoliberal consensus of the last thirty years, but that is gaining supporters on both sides of the American political spectrum.

China dominates global production in several of these strategic sectors. The United States learned, notably from semiconductor shortages during the pandemic, that dependence on supply chains controlled by potentially hostile foreign powers is a genuine strategic risk. Section 232 tariffs, from this angle, are less a trade policy than a national resilience policy. Their constitutional validity is more solid precisely because their basis is more clearly anchored in concrete national security concerns.

Trading Partners and Counter-Tariffs: The Reciprocal Impact

Europe, Canada, China: strategic reactions

The Supreme Court's decision on IEEPA created a window of opportunity for American trading partners. If IEEPA tariffs were illegal, that meant the counter-tariffs they had imposed in retaliation could also potentially be withdrawn in the context of negotiations. The European Commission indicated its willingness to negotiate a counter-tariff withdrawal if American tariffs were lifted. Canada and Mexico had similar discussions.

But the rapid transition to Section 122 and the 15% rate complicated these negotiations. American tariffs are still there, on a different legal basis. Foreign counter-tariffs are therefore maintained as well. The American sectors most severely affected by counter-tariffs — agriculture, notably soybean, wheat, and meat exporters — continue to pay the price of the trade war, even though the legal battle over IEEPA was technically won by the plaintiffs.

American businesses caught between two fires

American companies that depend on imports — in electronics, clothing, toys, household appliances — face increased costs since the imposition of tariffs, whether under IEEPA or Section 122. They have largely passed these costs on to American consumers in the form of imported inflation. The Bureau of Labor Statistics has documented price increases in several categories of goods directly linked to tariffs.

On the other side, the domestic industries that tariffs are supposed to protect have sometimes benefited from increased protection — notably in steel and aluminum. But the overall effect on the American economy remains debated among economists. The Peterson Institute for International Economics (PIIE) has estimated that IEEPA tariffs have cost the average American consumer several hundred dollars annually in reduced purchasing power. This cost is real but diffuse — each consumer bears a modest share, making it a politically invisible but economically significant tax at the aggregate level.

Implications for the Presidency: Emergency Economic Powers in Question

What can Trump still do on tariffs?

After the IEEPA decision, the inventory of available tariff tools for Trump has narrowed but remains substantial. Section 232 (national security) remains fully available for strategic industrial sectors. Section 301 (unfair practices) is available but requires formal investigations that take time. Section 201 (global safeguards) is available for industries specifically damaged by imports. And Congress could pass a new law explicitly granting the president the power the Court judged absent in IEEPA.

This last tool — new legislation — is legally the cleanest solution. But it is politically the most difficult. A law giving the president broad tariff powers would need to pass the Senate with 60 votes to break a filibuster, requiring Democratic support. Democrats are not opposed to trade protections on principle, but they would be reluctant to give Trump a blank check on trade policy. Negotiating a bipartisan legislative framework would take time — much more than the 150 days of Section 122.

The reach beyond Trump: future presidents and IEEPA

The decision of February 20, 2026 does not only affect Trump. It redefines the limits of executive power on economic matters for all future presidents. A Democratic president who wanted to use IEEPA to impose tariffs on imports related to carbon emissions — a form of border carbon adjustment — could no longer do so without explicit congressional authorization. A president who wanted to use IEEPA to economically isolate a geopolitical adversary in a national security emergency context would need to be much more precise in their legal justification.

This is potentially a significant limitation of presidential power over economic matters. Some constitutionalists applaud this limitation as a necessary rebalancing of the separation of powers. Others worry that the decision has made the tools of rapid economic response too dependent on a slow-acting Congress — which could weaken America's ability to react in the event of a genuine international economic emergency.

Financial Market Reactions: Volatility and Adaptation

From initial shock to chronic uncertainty

The February 20 decision initially provoked strong volatility on American financial markets. Importing companies whose stock prices had incorporated IEEPA tariff costs rallied. Domestically protected sectors — notably steel and aluminum — retreated. General indices ended slightly negative in a day of confusion, before stabilizing in the following days once the Trump administration announced the substitute Section 122 tariffs.

Markets' adaptation to Trump's tariff policy since 2025 has been remarkable. Investors have incorporated an trade uncertainty premium into their valuations — a recognition that tariff policy is unpredictable and liable to change rapidly. This uncertainty premium has a cost: it increases the cost of capital for high-import-content companies and reduces the valuation multiples of the most exposed sectors. It is a diffuse but real economic drag on investment and growth.

The dollar and global trade: second-order effects

Tariffs also have effects on the US dollar and on global trade flows. In theory, high tariffs should strengthen the dollar by reducing imports and improving the trade balance. In practice, the effect has been more nuanced: the reduction in imports has been partially offset by trade diversion — third countries serving as intermediaries for imports that circumvent tariffs. Studies have documented these diversions notably via Vietnam, Mexico, and other countries that have seen their exports to the United States grow significantly during periods of high tariffs on China.

These diversions do not entirely eliminate the protective effects of tariffs, but they reduce them considerably. They also mean that the declared objective of reducing dependence on foreign suppliers is not fully achieved: Chinese products enter the United States via intermediaries, with a few added transformation steps. American industry is not significantly more resilient — the tariffs have mainly redistributed profits along the supply chain without fundamentally reconfiguring it.

Bilateral Negotiations: China and Allies in a Reconfigured Landscape

China and the United States: a trade war that doesn't end

The Supreme Court's decision did not modify the essential dynamic of the US-China trade relationship. IEEPA tariffs on Chinese imports were replaced by Section 122 tariffs, to which are added Section 232 tariffs on steel and aluminum and Section 301 tariffs in force since the first term. China continues to face high American tariffs in the vast majority of product categories. Reciprocity applies: China maintains its counter-tariffs on American products, notably agricultural.

US-China trade discussions continue beneath the surface — technical and diplomatic negotiations that have alternated between freeze periods and dialogue periods since 2018. China has an interest in trade stability with the United States, its largest trading partner by value. The United States has an interest in Chinese concessions on trade practices, intellectual property rights, and subsidies to national industries. These converging interests have not yet produced a lasting agreement — and Trump's maximum tariff pressure strategy represents a bet that it will force them to one.

NATO allies and the paradox of tariffs on friends

One of the most controversial aspects of Trump's tariff policy is its application to NATO allies. Germany, France, Japan, South Korea — allies whose security partially depends on the American military umbrella — face the same tariffs as adversaries. The American argument: these partners practice unfair trade policies. The allied argument: these tariffs undermine alliances at the very moment when they are more necessary than ever in the face of Russia and China.

This paradox is at the heart of current transatlantic tensions. The European Union has maintained a firm position — maintaining counter-tariffs on targeted American imports while pursuing negotiations. It does not want to capitulate under pressure so as not to set a precedent of submission to American economic threats. It also does not want to escalate toward a full trade conflict that would harm both economies. It is a difficult balance to maintain, especially with the threat of 100% on digital taxes hanging over several of its members.

The Future of American Trade Policy: Toward a New Law?

Is Congress reclaiming its constitutional responsibility?

The decision of February 20, 2026 creates an opportunity that Congress has not seized since the Uruguay Round agreements of 1994: clearly and explicitly defining the president's tariff powers. Instead of relying on forty- or fifty-year-old laws with vague formulations, Congress could adopt a modern legislative framework that precisely defines when, how, and within what limits the president may impose tariffs.

Proposals in this direction have been put forward by economists and jurists from both parties. Such a framework could grant the president broader tariff powers than Section 122 while establishing review procedures, caps, and congressional oversight mechanisms. It would respond both to the Supreme Court's constitutional concerns and to the practical needs of effective trade policy. But the American Congress is not in the habit of seizing structural reform opportunities when things work day to day — even imperfectly.

Scenarios for July 2026 and beyond

As July 24, 2026 approaches — Section 122 tariffs' expiration date — several scenarios open up. The most likely in the short term: Trump asks Congress for an extension and obtains a narrow but favorable vote. The alternatives: Congress refuses and tariffs expire, creating a void that Trump will attempt to fill through other mechanisms — expanded Section 232, new Section 301 investigations, or a creative invocation of executive powers not yet tested before the courts. American tariff policy will not stop on July 24. It will reconfigure. This has become the norm of American trade governance.

What is certain: the Learning Resources v. Trump decision of February 20, 2026 will remain in the history of American constitutional law as a moment when the Supreme Court reminded a powerful president that certain limits exist, even for national emergencies. This is an important limit. It will not stop Trump's tariff policy — it will constrain it to find more solid legal foundations. And this process of legal constraint, however imperfect, is exactly the mechanism of the rule of law in action.

The Impact on Transatlantic Relations and the Global Trade Axis

Europe facing its revealed economic vulnerabilities

The American tariff saga of 2025-2026 has revealed with painful clarity the structural vulnerabilities of the European economy in its relations with the United States. The European Union massively exports to the American market — German automobiles, chemical products, French agri-food, industrial equipment. These exports are exposed to American tariffs. European counter-tariffs hit important American exports — farm machinery, bourbon, Harley-Davidson — but to a degree insufficient to create total reciprocal pressure.

Europe has sought to reduce its vulnerability by diversifying its export markets — notably toward Southeast Asia, India, and emerging African markets. These efforts are real but slow. The American market remains irreplaceable in the short term for many European exporting sectors. This dependence structures the power relationship in trade negotiations: Europe cannot afford a total trade war with Washington, even if it wanted to wage one.

What the tariff saga says about American hegemony in transition

Trump's trade policy since 2025 is, among many other things, the symptom of an American hegemony in transition. The United States that built the post-war commercial world order — GATT, WTO, free trade agreements — are now the United States contesting this order from within. This paradox destabilizes its allies, enthuses its adversaries, and leaves the world's trading partners in a state of profound strategic uncertainty.

The Supreme Court has, in part, put guardrails on this policy. It has reminded that even American trade policy has constitutional constraints. But these guardrails do not change the fundamental direction: the United States has decided that global free trade was a model that cost them more than it brought. If this decision is maintained in the coming years and decades — beyond Trump — it is the entire architecture of global trade that will need to be reconfigured. This is a challenge of a magnitude that the decision of February 20, 2026, however important it may be, will not resolve on its own.

American Consumers: The Real Payers of the Tariffs

A hidden tax on American households

Behind the constitutional debate over IEEPA and Section 122, a concrete economic reality deserves to be clearly named: tariffs are a tax paid by American consumers, not by foreign countries. Contrary to the political discourse presenting tariffs as penalties imposed on foreign exporters, the real economic mechanism is different: American importers pay tariffs at American customs and pass these costs on to consumers in the form of higher selling prices. It is American households that pay.

The Peterson Institute for International Economics estimates that IEEPA and Section 122 tariffs have cost the average American household several hundred dollars per year in reduced purchasing power. Lower-income households are proportionally more affected, as they devote a greater share of their budget to imported manufactured goods — clothing, electronics, household appliances. The beneficiaries of tariffs — protected domestic industries — are concentrated in a few states and a few sectors. The cost is diffuse, invisible, borne by all 330 million American consumers.

Imported inflation and the Fed's monetary policy

Tariffs contribute to imported inflation — a form of inflation that the Federal Reserve (Fed) cannot effectively treat with its traditional monetary policy tools. Raising interest rates can slow excessive domestic demand. It does not reduce the cost of a pair of jeans or a refrigerator raised by 15% tariffs. The Fed finds itself in a delicate position: having to manage inflation partially caused by government policies over which it has no control.

The dialogue between the White House and the Fed on this issue has been tense under Trump. The president has publicly criticized the Fed's monetary policy, accusing it of insufficiently supporting growth. The Fed, for its part, has maintained its institutional independence — independence crucial to the credibility of American monetary policy. This tension between inflationary trade policy and restrictive monetary policy is one of the structural contradictions of current American economic governance.

Rebuilding Commercial Multilateralism: The WTO in Crisis

The World Trade Organization on the edge of implosion

The American tariff saga of 2025-2026 is accelerating a deeper crisis of the World Trade Organization (WTO). This institution, founded in 1995 to manage trade disputes between member states according to common rules, has been in structural difficulty for several years. Its dispute settlement mechanism — the Appellate Body — has been paralyzed since 2019 because the United States blocked the appointment of new judges under Trump and then Biden. The WTO can no longer fully function as an arbiter of trade conflicts.

This WTO paralysis is in part an American political choice. Washington decided that WTO rules no longer sufficiently served its interests — notably in the face of Chinese trade practices that the organization struggled to address effectively. But this decision to paralyze the WTO has consequences that go far beyond the American-Chinese dossier. It deprives all 164 WTO members of an effective conflict resolution mechanism. It weakens developing countries that depend on WTO rules to resist the commercial pressures of great powers.

Toward a fragmented global trade system

The WTO's paralysis, combined with trade wars and proliferating bilateral trade agreements, is drawing a global trade system on its way to fragmentation. Instead of a set of common rules applying to all, we see emerging regional trade blocs — the American commercial space, the Chinese economic sphere, the European internal market — with different rules, different standards, different tariffs depending on geopolitical affiliations.

This fragmentation has a real economic cost for the entire global economy. The gains from international specialization, the global value chains, the economies of scale permitted by large, integrated markets — all of this shrinks in a fragmented trade world. International Monetary Fund estimates suggest that the complete fragmentation of the global economy into geopolitical blocs could reduce global GDP by several percentage points in the medium term. This is not trivial. These are decades of growth sacrificed on the altar of geopolitical rivalries.

Conclusion: Legal Victory, Continuation of the Political Battle

The Supreme Court won a battle, not the war

The Learning Resources v. Trump decision is an important victory for the principle of separation of powers in the American constitutional system. It reminds that even a determined president cannot transform an emergency law into a permanent instrument of trade policy without congressional authorization. It is a victory for constitutionalism, for the rule of law, for the principle that ends do not justify all legal means.

But this legal victory has not stopped the tariffs. It has only shifted them toward other legal bases. Trump's protectionist trade policy continues — with Section 122 until July 24, with Section 232 tariffs permanently, with new threats on digital taxes. The battle for the direction of American trade policy will be fought less in the courts than in elections, in negotiations with Congress, and in bilateral trade negotiations with Europe, China, and Asian allies.

The lesson for the West: rules protect everyone

What this saga teaches the West — and in particular the United States' trading partners — is that the rules of the international trade game are only solid if all major actors respect them. When the United States circumvents its own commitments to the WTO, invokes emergencies to impose tariffs contrary to international trade law, and threatens allies with 100% tariffs on digital taxes, they erode the system of rules they helped to build. This erosion is not in the West's long-term interest — even if certain specific measures may be in the short term.

The hope I draw from the decision of February 20, 2026 is that American institutions have shown their capacity to say no to executive power. Not perfectly. Not definitively. But clearly. This is a lesson that democracies worldwide — confronted with growing pressures on their institutions — can retain: institutions matter, procedures matter, rules matter. Even when they are slow, even when they are imperfect, they are what separates democracy from the arbitrary.

Signed Maxime Marquette, columnist

Columnist's transparency box

Sources and analytical methodology

This analysis rests on publicly available judicial decisions (Learning Resources, Inc. v. Trump, Court of International Trade decision of May 7, 2026), CNBC reports of June 26, 2026 on new tariff threats, and analyses from specialized institutions such as Gibson Dunn, Perkins Coie, Holland & Knight, the Peterson Institute for International Economics, and SCOTUSblog. The legal facts — case numbers, dates, votes, reasoning — are faithfully reported from these verifiable primary sources.

The analysis of economic and geopolitical impacts reflects the columnist's analytical judgment based on these sources. Uncertainties are flagged as such. Certain judicial decisions mentioned (notably the Section 122 appeal) were in progress at the time of writing and may have evolved since.

Limitations of the analysis

American trade policy evolves rapidly. Some elements of this analysis — notably regarding the expiration of Section 122 on July 24, 2026, and ongoing trade negotiations — may be superseded by subsequent events. The columnist does not claim exhaustiveness on a dossier of exceptional legal, economic, and political complexity. This analysis aims to give the reader a solid understanding of the fundamental constitutional issues and their practical implications, not an exhaustive treatise on American trade law.

The editorial positions expressed in the mini editorial passages are those of the columnist and do not constitute professional legal or economic advice. For specific business decisions affected by these tariffs, consult specialized legal and economic advisors.

Sources

Primary sources

CNBC — Trump threatens 100% tariffs on countries with digital services taxes — June 26, 2026

Gibson Dunn — Section 122 Global Tariffs Invalidated by the Court of International Trade — May 2026

Holland & Knight — Supreme Court Strikes Down IEEPA Tariffs — February 20, 2026

SCOTUSblog — The remaining questions after the Supreme Court's tariffs ruling — March 2026

Secondary sources

Peterson Institute for International Economics — What the Supreme Court's tariff ruling changes and what it doesn't — 2026

Perkins Coie — Section 122 Tariffs Ruled Unlawful — May 2026

United States Supreme Court — Learning Resources, Inc. v. Trump, official opinion — February 20, 2026