The European Commission has warned the United States to honor existing trade commitments following a Supreme Court ruling that has created new uncertainty around tariff policy. EU officials stressed that "a deal is a deal" as Washington considers implementing a new 15% global tariff proposed by President Donald Trump.

Brussels expressed concern about the stability of transatlantic trade rules after Trump's response to the court decision, which could affect previously negotiated agreements. The Commission emphasized that unpredictable tariff actions risk creating uncertainty for businesses and supply chains across both economies.

The EU and the US remain each other's largest trading partners, making clarity on tariffs crucial as policymakers work to preserve momentum in ongoing negotiations. European officials said the bloc remains committed to constructive engagement but expects the United States to uphold fair and balanced trade conditions while both sides assess the implications of the ruling.