COMMENTARY: Trump governs by Truth Social posts — and it works, which is terrifying

The post that shook global markets

On Friday, June 26, 2026, in the late afternoon, United States President Donald Trump published a message on his Truth Social platform threatening to impose 100% tariffs on exports from any country that levied a Digital Services Tax (DST) on American technology companies. The message was direct, unequivocal, and of potentially colossal economic reach. It explicitly named "many European countries" in the process of discussing the imminent implementation of such a tax.

Trump added that this 100% tariff would "supersede any trade deal with the country, whether implemented, signed, or not." This post was published one day after the European Union had given its final approval to a trade deal with Washington that had taken months to negotiate. Translation: in a single social media message on a platform he created for himself, Trump potentially invalidated a major multilateral agreement, triggered a panic reaction across European chancelleries, and may have launched a new phase of the transatlantic commercial war.

This isn't new — it has become the norm

This is not the first time Trump has governed by Truth Social post. His second-term administration has systematised this practice: tariff announcements, diplomatic ultimatums, threats of commercial retaliation — everything flows through a social media platform he controls entirely, bypassing the usual institutional processes of verification, consultation, or coordination. As early as 2025, he had forced Canada to back down on its digital tax with a similar threat posted on Truth Social.

I'll say something that will displease many: Trump is right tactically. Foreign policy is played on the perception of power, and an unpredictable leader who can modify the rules of commercial engagement with one giant tweet creates a real form of deterrence. The problem is that this method also destroys the institutions that underpin long-term international cooperation.

How a single message disrupts markets and diplomacy

Analysing a Trump Truth Social post as a mere communications message is to miss the point entirely. These posts function as real and immediate foreign policy instruments, with measurable effects on financial markets, diplomatic decisions, and state behaviour. The post of June 26 immediately triggered reactions across several European capitals. France, whose president Emmanuel Macron had declared his intention to maintain the French digital tax on American companies, found itself in the front line. The United Kingdom also had to defend its position.

This ability to generate instant political urgency is one of the central strengths of the Trump method. Before institutional deliberations can begin, before diplomatic cabinets have had time to formulate a coordinated response, the market and the media have already absorbed the threat as real. Bloomberg, Wall Street Journal, CNBC, Al Jazeera, Politico — all treated this post as a major foreign policy decision, which gives it effective reality even without a formal presidential decree.

Legal authority: an open question

The United States Supreme Court declared unconstitutional the sweeping tariffs imposed by the Trump administration under the International Emergency Economic Powers Act (IEEPA). Trump responded by seeking alternative legal bases — notably Section 122 of the Trade Act of 1974 — to maintain a global 10% tax on imports. The question of what law would allow him to instantly impose 100% tariffs on specific countries simply because he wrote it on Truth Social remains legally very unclear, according to CNBC.

This is the central paradox of the Trump method: the threat is credible even when its legal basis is uncertain. Countries, companies, and markets cannot bet on courts stopping Trump — because judicial proceedings take time and the economic damage happens first. The threat itself is enough to change behaviour.

A deal ratified yesterday, threatened today

On June 25, 2026, European Union Council members gave their final approval to the EU-US trade agreement, establishing a cap of 15% on most European tariffs toward the United States in exchange for the removal of European tariffs on American industrial goods. This agreement had taken nearly a year of difficult negotiations, with safeguard clauses allowing the EU to suspend tariff preferences if Washington failed to honour its commitments.

Less than 24 hours after this ratification, Trump published his Truth Social post threatening 100% tariffs that "supersede" any trade deal. This timeline is revealing: either Trump did not know the agreement had just been ratified (unlikely), or he did not care, or he was deliberately seeking to maintain maximum pressure on his trade partners even after a deal had been signed. According to Politico, this threat "risks complicating trade negotiations with the European Union."

France in the crosshairs: wine versus digital

France has long been in Trump's sights on the digital tax question. In June 2026, during the G7 hosted by France, Trump had already threatened 100% tariffs on French wines and champagne if Paris did not exempt American companies from its 3% digital services tax. This specific threat illustrates how Trump uses Truth Social: declarations are precise enough to signal intent, vague enough to preserve flexibility. "I told them not to tax American companies, and if they do, I have no choice" — this is diplomatic blackmail, clearly articulated.

I must admit this way of governing concerns me deeply — not because Trump is wrong on the substance. European digital taxes targeting American giants do raise legitimate reciprocity questions. But reducing commercial policy to Truth Social posts deliberately bypasses the institutions that allow negotiated rules to be applied predictably. Predictability is the foundation of all international trade.

European diplomats in permanent crisis-management mode

European capitals have since 2025 developed an informal protocol for monitoring Truth Social: diplomatic teams monitor Trump's account in real time and are ready to activate crisis cells if a major post appears. This adaptation reveals how thoroughly governing by post has changed diplomatic practices. American embassies in European capitals are playing an increasingly diminished role — it is Truth Social, not the State Department, that now articulates American commercial policy first.

This situation is particularly problematic for partners who signed deals with Washington believing they had secured a degree of stability. When the American president can invalidate a trade deal with a post on a social media platform he owns, the value of those deals becomes fundamentally uncertain. For European companies that had already adjusted their export strategies based on the EU-US agreement ratified on June 25, this post of June 26 is a real and immediate source of risk.

Trump: the necessary evil for the Western economic order?

Intellectual honesty requires acknowledging: European digital taxes primarily targeting Google, Apple, Meta, Amazon, and Microsoft raise legitimate questions of commercial reciprocity. These companies generate enormous profits in Europe, fiscally optimise their presence, and European states legitimately seek to capture part of this economic value. The fundamental tension between American technological dominance and Europe's desire for fiscal sovereignty is real.

I'll defend an uncomfortable position: Trump is right on the substance in certain cases — European digital taxes are often disguised taxes on American companies, which is indeed discriminatory. But his method — the Truth Social post that invalidates a trade deal — is corrosive to the international institutional order. You can be right on substance and wrong on method. Trump manages to be both.

The art of the vague but credible threat

Trump's method rests on a well-known doctrine from his first term: strategic unpredictability. By threatening 100% tariffs without a clear legal basis, by linking his threat to any discussion of a digital tax (even in countries that have not yet adopted one), by specifying that his tariff would "take effect immediately," Trump creates maximum uncertainty at minimal political cost. It costs him nothing to publish this post — but the potential consequences for targeted countries are massive.

This asymmetry is the essence of the Trump method. A leader who does not have to consult the Senate, evaluate constitutional implications, or coordinate with allies before making a major statement has a definite tactical advantage over more deliberative democratic systems. The problem is that this speed of decision undermines the durable commitments on which international cooperation rests.

The Canadian precedent as proof of effectiveness

In 2025, Canada abandoned its digital tax on American companies after similar threats from Trump posted on Truth Social. This precedent validates the method — it works. And if it works, Trump will keep using it. The question is no longer whether this form of governance is theoretically good or bad — it is a reality that America's allies must live with.

Something in me resists the idea that a Truth Social post written on a Friday afternoon can define the commercial policy of the world's largest economy. And yet this is the reality of 2026. I don't know if this is the future of democracy or its decomposition. Probably a bit of both.

The well-tested mechanics of Trumpian commercial pressure

To understand the Truth Social post of June 26, 2026 on digital taxes, it must be placed in the broader context of Trump's commercial strategy. Since his first term, the pattern has been identical: announcement of a spectacular punitive measure — 100% tariffs, sanctions threats, withdrawal from agreements — followed by a period of intense negotiation, then either a concession from the other side (which allows Trump to declare victory), or partial implementation. This mechanism worked with China in 2018–2019 (Phase 1 agreement), with Canada and Mexico to renegotiate NAFTA into CUSMA, and with the European Union on multiple occasions.

This model creates permanent uncertainty for Washington's trade partners, but it also has an internal logic. Trump uses the threat of maximum tariffs as a negotiating tool, knowing that targeted countries often prefer to concede on a specific point rather than risk massive economic retaliation. The problem is that this strategy erodes institutional trust in American trade deals — if a strong enough threat can always modify agreed terms, American commitments lose their predictable value.

I must admit one thing: Trump's strategy sometimes works. Canada backed down on its digital tax in 2025 under American pressure. The EU made concessions in trade negotiations. There is a short-term effectiveness to this approach. What concerns me is the long-term cost to trust: when deals can be reopened by a next-morning post, they are worth less. And trust, once eroded, is very hard to rebuild.

Google, Apple, Meta, Amazon — the European fiscal challenge

To understand Trump's fury against European digital taxes, one must understand what they represent in economic reality. American technology giants — Google, Apple, Meta, Amazon, Microsoft — generate billions in revenues in Europe while fiscally optimising their presence to minimise tax in high-rate jurisdictions like France, Germany, or Italy. The Digital Services Taxes (DST) that several European countries have introduced or are considering are an attempt to capture a fraction of this economic value.

From the European perspective, this is a matter of fiscal sovereignty and economic reciprocity: if American companies do business in Europe and extract value from it, they should contribute to European public finances. From the American perspective — and from Trump's — it is discrimination against American companies with no basis in WTO rules. Both perspectives are understandable and the tension between them is real. What is less defensible is the method chosen to resolve it.

I understand the logic on both sides. Europe wants to tax companies making profits on its territory — that is legitimate. America defends its national companies — that is understandable. But what concerns me is that this real and legitimate fiscal conflict is being managed not through WTO negotiations or a structured multilateral framework, but through Truth Social posts threatening to blow everything up. This is a dangerous way to govern global economic relations.

Diplomatic responses that reflect dependence

Faced with the 100% tariff threats posted by Trump on Truth Social, international reactions reveal the geography of dependence. The United Kingdom, which maintains its own digital tax, defended its position on June 26 — but without escalation, recalling its attachment to the special relationship with Washington. France, which has maintained its DST despite repeated Trump pressure, finds itself on the front line. The European Union, which has just ratified a trade agreement with the United States, is placed before a dilemma: apply a legitimate digital tax at the risk of triggering 100% tariffs that would wipe out the benefits of the deal it just signed.

This situation — in which a trade agreement can be invalidated by a Truth Social post the day after ratification — illustrates the predictability deficit that characterises current American commercial policy. Multinational companies must manage tariff risks that can appear or disappear with the American president's morning messages. This instability carries a real economic cost, measurable in investment decisions, supply chain strategies, and market expectations.

Perhaps this is the real question that Trump's Truth Social governance raises: can you build durable economic partnerships on the basis of commitments that can be invalidated by a post at any moment? My answer is no. Reliability is a prerequisite for international cooperation. Without it, every agreement is precarious, every investment is risky, every relationship is conditional. The West deserves better than that.

Adapting without capitulating

European allies must find a difficult balance: not yielding to unconstitutional or illegal threats from Trump, while maintaining indispensable commercial and security relationships. This position requires more robust European coordination, a rapid-response capability to Truth Social announcements, and above all a clear doctrine on what is negotiable and what is not. The digital tax can be a subject for discussion — but not under the pressure of a Friday afternoon post.

What this method reveals about the state of American democracy

Beyond trade, what stands out about the June 26 post is what it reveals about the state of American institutions: an economic foreign policy that can be modified in 280 characters, without consultation with Congress, without coordination with allies, without assessment of the impacts. This is a presidentialisation of foreign policy pushed to its extreme, and it constitutes a systemic fragility for the credibility of long-term American commitments.

I finish this commentary with a question I ask myself often: does Trump genuinely believe that governing by social media posts is the best way to manage international relations? Or is it a calculated performance for domestic audiences? I don't know. What I know is that America's allies cannot build durable policies on the basis of permanent unpredictability. And that this uncertainty carries a real economic and geopolitical cost, even if the posts generate clicks.

By Maxime Marquette, columnist

Editorial stance

I am not a journalist but a columnist and analyst. My expertise lies in observing and analysing the geopolitical, economic and strategic dynamics that shape our world. My work is to take political strategies apart, to understand global economic movements, to put the decisions of international actors in context and to offer analytical perspectives on the changes that are redefining our societies.

I do not claim the cold objectivity of traditional journalism, which stops at reporting facts. I claim analytical clarity, rigorous interpretation and a deep understanding of the complex issues that concern us all. My role is to give meaning to the facts, to place them in their historical and strategic context, and to offer a critical reading of events.

Method and sources

This text keeps the basic distinction between verified facts and interpretive analysis. The rule never changes: a factual claim is published only when a verifiable source supports it, and the sources this article actually used are listed under Sources, never here.

Primary source families used by the publication, when the story has them: official statements from governments and international institutions, public statements by political leaders, reports from intergovernmental organisations, dispatches from recognised international news agencies.

Secondary source families: specialised publications, internationally recognised news media, analyses from established research institutions, reports from industry organisations.

When an article cites statistical, economic or geopolitical data, it comes from the institutions that produce it (intergovernmental organisations, central banks, national statistics offices), and the exact institution is named under Sources.

Nature of the analysis

The analyses, interpretations and perspectives in the analytical sections of this article are a critical, contextual synthesis based on the information available, the trends observed and the expert comments cited in the sources consulted.

My role is to interpret these facts, to set them in the context of today's geopolitical and economic dynamics, and to give them a coherent meaning within the larger story of the changes shaping our time. These analyses reflect expertise built through continuous observation of international affairs and an understanding of the strategic mechanisms that drive global actors.

This article describes a documented state of affairs on its publication date, not a prediction: later developments may shift its outlook. No update is promised in advance; when an article is corrected or completed, the change is dated in the text.