OPINION: Trump, Tariffs and Allies — the Day Washington Declared a Trade War on Its Own Friends

Introduction: One Post, One Hundred Percent, and Allies Left Gasping

The Truth Social Bombshell of June 26, 2026

On June 26, 2026, Donald Trump posted on Truth Social an announcement that sent chills through European and Asian capitals: he threatened to impose 100 percent tariffs on imports from any country that had introduced a Digital Services Tax (DST) targeting American companies. France, India, Canada, the United Kingdom, Italy, Spain — all in his crosshairs. The timing was all the more staggering because it came less than 24 hours after the conclusion of an EU-U.S. trade agreement that had capped tariffs at 15 percent. With a single post, Trump had potentially torpedoed months of diplomatic negotiations.

France in the Eye of the Storm

France has applied since 2019 a digital services tax of 3 percent on companies whose global turnover exceeds 750 million euros and French revenues 25 million euros. This tax primarily targets the GAFAMs — Google, Apple, Facebook, Amazon, Microsoft. For Paris, it is a matter of fiscal sovereignty and fairness. For Washington, it is a discriminatory attack against American companies. The gap between these two readings is exactly the chasm into which the transatlantic alliance has been falling for seven years.

The June 25 EU-US Agreement: A Victory Shattered in 24 Hours

Fifteen Percent — a Painful but Real Compromise

On June 25, 2026, the European Commission and the U.S. Trade Representative announced a trade framework agreement capping reciprocal tariffs at 15 percent on a range of industrial and agricultural products. For Brussels, this was a major concession: the EU had initially refused any unilateral tariff, considering that only the WTO had authority to regulate trade practices among its members. Accepting the 15 percent cap principle marked a pragmatic capitulation in the face of the power dynamic imposed by the Trump administration.

Less Than 24 Hours to Undo Everything

But Trump's post the following day on digital taxes plunged Brussels into confusion. European negotiators spent the first hours after the post trying to determine whether the 100 percent threat applied on top of the 15 percent cap or as a replacement, and whether it concerned only countries with active DSTs or all trading partners. No official clarification came from the White House in the 48 hours that followed — a calculated uncertainty that is one of the hallmarks of the Trump method.

Markets reacted immediately: the euro lost 0.4 percent against the dollar in the hours following the post, and shares of European companies exposed to American markets fell 1 to 2.5 percent at the Wall Street opening. Markets anticipate Trump better than diplomats do: they know the threat is real even if not immediately executed.

The Legal Precedent: The Supreme Court and Section 122

When Judges Constrain the President

Trump's tariff strategy runs into a significant legal obstacle: the U.S. Supreme Court handed down in April 2026 a decision limiting the use of emergency tariffs — national emergency tariffs had been ruled unconstitutional in the specific case of application to allies without documented national security threat declarations. At the same time, Section 122 of the Trade Act of 1974, invoked by Trump for certain tariffs, is time-limited to 150 days without congressional renewal.

Congress as a Brake — in Theory

These legal constraints mean that the threat of 100 percent on digital taxes should theoretically require an explicit legal basis — either new legislation, or a national security threat declaration, or recourse to the authority of the Trade Expansion Act of 1962 (Section 232). In practice, the Trump administration has demonstrated considerable legal creativity to circumvent these limits, and the Republican Congress has shown little inclination to firmly oppose it since 2025.

The American paradox: the same democratic system that produces institutional checks — Supreme Court, Congress — is paralyzed when political actors lack the will to activate them. American democracy rests on unwritten norms as much as on laws, and the Trump administration has precisely identified and exploited this space.

NATO Allies in the Crosshairs: Denmark, Norway, France

January 2026: The Greenland Tariffs

The June 26 trade threat did not come from nowhere. In January 2026, Trump had already applied punitive tariffs to several NATO allies in the context of the Greenland controversy: Denmark, Norway, Sweden, France, Germany, the United Kingdom, the Netherlands and Finland had all been targeted by various tariff measures. The message was clear: being a NATO ally guarantees no commercial immunity in Trump's world. Security and trade are two separate files — and both can be used as leverage simultaneously.

The Berlin and Paris Calculus

Germany and France, the two economic powers of the European bloc, responded to the January 2026 tariffs with a combination of rhetorical firmness and practical concessions. Germany agreed to increase its NATO defense spending faster than planned — in part to remove that argument from Trump's hand. France opened bilateral discussions on exports of French wines and agricultural products to the United States, hoping to create an American economic interest in maintaining good commercial relations with Paris.

These strategies reveal the fundamental deadlock facing European allies: they cannot retaliate symmetrically — an all-out trade war with the United States would destroy Europe more than it would hurt Washington. They cannot ignore the tariffs — the economic impact is real. They cannot accept without conditions — the fiscal and commercial sovereignty of the EU would be drained of all meaning. The only option is permanent negotiation, in a structurally unfavorable balance of power.

Digital Taxes: The Heart of the Sovereignty Debate

DSTs: Fiscal Sovereignty or Disguised Protectionism?

The debate over digital services taxes is fundamentally a debate about fiscal sovereignty in a digital world. American technology companies — Google, Apple, Meta, Amazon — generate substantial profits in Europe by locating their tax structures in low-tax countries like Ireland and Luxembourg, thereby avoiding tax where they actually create value. DSTs aim to correct this fiscal arbitrage, imposing a tax where revenues are generated.

The OECD Project and Its Partial Shipwreck

The OECD Inclusive Framework had developed between 2019 and 2021 an international agreement on minimum taxation of multinationals (Pillar Two) and on the allocation of taxing rights (Pillar One). The Biden administration had supported these agreements. The Trump administration torpedoed them in 2025, withdrawing the United States from negotiations and threatening tariffs on any country maintaining a DST — seen as a unilateral discrimination against American companies.

This American position reveals a fundamental hypocrisy: the United States defends free markets globally, but opposes any international tax rule that would limit the advantage of its technology companies. This is selective multilateralism — you pick the rules you like and bomb-tweet the rest.

The Impact on Exposed European Industries

Auto, Agriculture, Pharma: Three Sectors Under Pressure

Trump's real and threatened tariffs weigh particularly on three European sectors: the auto industry (Volkswagen, Stellantis, BMW exposed to a 25 percent tariff already in force), agriculture (French wines, cheeses, spirits; Italian Parmesan and Prosecco), and pharmaceuticals (Trump raised in May 2026 the prospect of tariffs on imported medicines, a threat directly affecting Swiss, Irish and German exporters). These sectors employ millions of Europeans and sit at the heart of the continent's economic competitiveness.

The Industry Response: Intense Lobbying in Washington

The European industry response has been pragmatic: delegations of major industrial groups take turns in Washington, offering additional American investments in exchange for tariff exemptions. BMW announced an investment of 1.7 billion dollars in its Spartanburg, South Carolina plant. Airbus decided to shift part of its A320 assembly line to Mobile, Alabama. These moves are driven by economic survival as much as by ideological conviction.

Partial industrial relocation to the United States under tariff pressure is exactly what Trump is after — and he is getting it, at the cost of weakening the European industrial base and increasing dependence on American markets. This is a structural reorganization of the Atlantic economy under unilateral duress.

NATO and Trade: The Toxic Mix

When Security Becomes a Commercial Bargaining Chip

The real danger of the Trump strategy is not economic — tariffs hurt but European economies adapt. The real danger is political and strategic: by explicitly linking NATO's collective defense obligations to bilateral commercial concessions, Trump erodes the credibility of Article 5. If European allies must pay a commercial tribute to maintain the American security umbrella, NATO ceases to be an alliance founded on shared values and becomes a protection racket.

Zelensky Watches the Mechanics of Fear

Volodymyr Zelensky watches this dynamic with particular anxiety. Ukraine depends on Western support — military, financial, diplomatic. If that support can be conditioned on commercial concessions by the next American administration, Ukrainian security is as fragile as the next Truth Social post. This is why Ukraine actively pushes for an autonomous European security guarantee architecture — less dependent on the will of a single man in Washington.

Europe must build its defense capacity not because Trump is right to neglect it, but because dependence on an unpredictable protector is a strategic vulnerability. If Trump forces Europe to defend itself by threatening tariffs, the paradoxical result could be exactly what the West needs: a strategically autonomous Europe, capable of holding without waiting for Washington.

Emerging Markets and the Signal Sent to the Rest of the World

When Allies Suffer, Adversaries Watch

China watches the transatlantic trade war with a mix of strategic interest and calculated satisfaction. Every hour Europe spends negotiating tariff exemptions with Washington is an hour diverted from building a coherent trade policy toward Beijing. The fragmentation of the transatlantic alliance on economic questions precisely weakens the Western capacity to speak with one voice in international trade forums — WTO, G20, OECD — where U.S. and EU positions now diverge on fundamental issues.

India, Brazil and the Temptation of Commercial Non-Alignment

The major emerging economies — India, Brazil, Indonesia, South Africa — watch the US-EU trade tensions with interest. Several of them apply digital services taxes themselves and are waiting to see whether the EU capitulates to American pressure before deciding their own position. If Europe caves on its DSTs to avoid 100 percent American tariffs, the message sent to India will be clear: Washington can impose its tax rules on the entire world through economic threat alone.

This precedent of fiscal capitulation would be far more damaging in the long term than the tariffs themselves. It would establish that the fiscal sovereignty of states is negotiable as soon as the United States waves the trade threat. And in a world where China seeks to present itself as the defender of the sovereignty of Global South nations against American unilateralism, this European capitulation would hand Beijing a golden propaganda argument.

Conclusion: The Necessary Evil and Its Collateral Damage

Trump as Revealer of Western Fragilities

Donald Trump did not invent transatlantic trade tensions. He exacerbated, accelerated and weaponized them. Digital tax imbalances, insufficient European defense spending, dependence on American markets — all of this existed before him. What he did was use these realities as pressure levers without any qualms. A post threatening 100 percent tariffs is not policy — it is negotiation by intimidation. And it works because Europe has not yet found the right response to a diplomacy based on fear rather than rules.

The West Holds — But at What Cost?

The EU-U.S. agreement at 15 percent of June 25, 2026 still holds, despite the turbulence. Atlantic institutions survive, even battered. But every episode like this leaves marks: in mutual trust, in the political will of European partners to invest in the alliance, and in the perception that nations worldwide have of the reliability of the United States as a long-term partner. The West remains the center of the world — but it will need to rebuild its institutional foundations in the post-Trump era, whatever the outcome of the next American elections.

Signed Maxime Marquette, columnist

Columnist's transparency box

Sources and context

This opinion column draws on published information regarding Trump's trade policy since January 2026, EU-U.S. negotiations, and American Supreme Court rulings on emergency tariffs. Data on specific tariffs, investment amounts and judicial decisions come from verifiable public sources. The opinions expressed are those of the columnist.

Positioning

The columnist considers Trump an actor whose methods are problematic but whose certain objectives — increasing European defense spending, commercial rebalancing — may produce beneficial unintended effects. This nuanced position does not constitute an endorsement of his methods.

Sources

Primary sources

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

European Commission — EU-U.S. trade agreement 15% cap — June 25, 2026

U.S. Supreme Court — Emergency tariffs ruling — April 2026

Secondary sources

Peterson Institute — Digital Services Taxes and U.S. Trade Policy — 2026

Bruegel — EU-U.S. Trade Tensions Tracker — June 2026

Politico Europe — Trump tariffs on NATO allies — 2026