President Trump threatened to impose 100% tariffs on European countries in a move that could upend recent trade negotiations. The warning directly targets European nations over their technology taxation policies, creating immediate uncertainty for multinational corporations operating across the Atlantic.

European officials finalized a trade deal with the United States just days ago, but Trump's threat suggests the agreement may not survive his administration's pushback. The president claimed these tariffs would override the existing framework, potentially nullifying weeks of diplomatic work.

Technology companies now face a volatile policy environment where tax strategies could trigger severe trade retaliation. Stock markets reacted negatively to the news, with investors pricing in potential supply chain disruptions and reduced transatlantic commerce.

The threat represents a significant escalation in trade tensions between the US and EU, with European countries caught between implementing digital services taxes and avoiding punitive American responses. This approach risks fragmenting global tech markets and forcing companies to restructure European operations.