EU Demands Clarity from U.S. After Supreme Court Strikes Down Trump Tariffs

The European Commission has urged the United States to honour the terms of last year’s EU-U.S. trade agreement following a fresh wave of tariff uncertainty triggered by a U.S. Supreme Court ruling.

After the Supreme Court of the United States invalidated  President Donald Trump’s sweeping global tariffs, Trump responded by announcing new across-the-board levies. Brussels said Washington must now provide “full clarity” on how it intends to proceed and whether the new measures are consistent with the existing bilateral deal.

“The current situation is not conducive to delivering fair, balanced, and mutually beneficial transatlantic trade,” the Commission said, stressing that the agreement reached last year remains binding. “A deal is a deal.”

The statement marked a sharper tone compared to the Commission’s earlier reaction when it said it was still assessing the court’s ruling.

Under the 2025 EU-U.S. trade arrangement, most EU exports to the U.S. face a 15% tariff ceiling, with exemptions for certain goods such as aircraft and spare parts. In return, the EU reduced duties on a range of American products and shelved plans for retaliatory tariffs.

However, uncertainty now surrounds whether Trump’s newly announced 15% tariffs override the agreed framework. If so, existing exemptions could be scrapped, and new duties might be layered on top of standard U.S. “most-favoured-nation” rates, something the deal was designed to prevent.

Analysts warn that the EU’s competitive edge under the 15% cap could also erode, as countries without specific agreements may now face similar rates.

Trade monitor Global Trade Alert estimates the EU economy could be 0.8 percentage points worse off under the new tariff regime, with Italy potentially hit harder at 1.7 percentage points.

The Commission warned that unpredictable tariff changes risk undermining investor confidence and destabilizing global markets. EU Trade Commissioner Maros Sefcovic has already held talks with the U.S. Trade Representative Jamieson Greer and Commerce Secretary Howard Lutnick in a bid to clarify Washington’s position.

Brussels insists that EU exports must continue to receive the “most competitive treatment” under the agreed ceiling, warning that any deviation could strain transatlantic trade relations.