President Donald Trump has threatened a tariff investigation against the European Union in response to its USD 3.5 billion fine on Google for breaching digital competition rules. In a social media post, Trump called the penalties “very unfair,” adding, “the American Taxpayer won’t stand for it,” and vowed that his administration “won’t allow these discriminatory actions to stand.” The warning signals potential trade escalation and may serve as a fallback if the Supreme Court rules against the administration’s use of the International Emergency Economic Powers Act to impose broad tariffs. The EU’s digital service tax, central to addressing its fiscal deficit, has drawn U.S. opposition, partly to deter other nations like South Korea from adopting similar measures.