Brussels is growing tired. Not angry, not yet—but the kind of tired that comes when you feel like you’ve been trying to talk sense into someone who just won’t listen. That someone, in this case, is Washington.
What started as cautious optimism for a trade breakthrough between the European Union and the United States is fast slipping into hard-nosed realism. The EU thought it might live with a 10% tariff on exports to the U.S.—not ideal, but manageable. But now, with President Donald Trump floating a possible 30% tariff by August 1, the mood has shifted. Talks in Washington last week didn’t help. If anything, they added to the confusion.
EU Trade Commissioner Maroš Šefčovič returned to Brussels without much to show for his meetings. According to several diplomats, each U.S. counterpart he met gave him a different version of what might be acceptable. Some hinted the 10% tariff could still be on the table. Others suggested higher figures. But none could say for sure what would stick with Trump. One diplomat summed it up with a shrug: “No one can tell him what would actually fly with Trump.”
That ambiguity is becoming a problem. The EU, while still holding out hope for a negotiated solution, is preparing for a different kind of conversation—one that speaks the language of leverage. And that language has a new name in Brussels: the Anti-Coercion Instrument, or ACI.
Originally drafted with China in mind, the ACI is now being dusted off and eyed with fresh seriousness. This mechanism allows the EU to retaliate if another country applies economic pressure on member states. That pressure, EU officials say, is now unmistakably coming from Washington.
And retaliation? It's not just about slapping tariffs on Harley-Davidsons and bourbon anymore. The ACI opens the door to a wide playbook—cutting off U.S. access to EU public tenders, limiting American firms in financial services, placing curbs on intellectual property protections, or blocking U.S. food and chemicals from European shelves. It’s a big stick. One EU diplomat even called it “the nuclear option.”
Until now, France has been the loudest voice calling for the ACI to be used. Others were more cautious—Germany, for instance, preferred dialogue over escalation. But that line is blurring. Berlin is now saying the time has come to at least consider the measure. And with that, support appears to be building behind the scenes.
There’s already a suspended EU tariff package worth €21 billion ($24.5 billion) sitting on the shelf, due to expire on August 6. A second set, potentially targeting up to €72 billion in U.S. exports, is in the works. These packages are not symbolic—they're leverage in waiting. If Trump moves forward with 30% tariffs, the EU won’t be caught flat-footed.
Washington, for its part, has shown little appetite to ease existing duties—25% on European cars and parts, 50% on steel and aluminum. And the idea of a “standstill” clause—where both sides agree to freeze tariff levels during negotiations—was flatly rejected. Trump’s camp insists national security gives them the right to act unilaterally, invoking Section 232 in industries like semiconductors, pharmaceuticals, even timber.
European Commission President Ursula von der Leyen has been publicly measured, saying last week that the ACI is for “extraordinary situations.” But behind closed doors, the calculus may be changing. To activate the instrument, the Commission needs a qualified majority: at least 15 EU countries representing 65% of the population. And according to multiple diplomats, the numbers are getting close.
The EU didn’t want a trade war. It still doesn’t. But as the summer days tick down to that August 1 deadline, the tone in Brussels is less about hoping for the best—and more about preparing for the worst.