Jamieson Greer, the United States Trade Representative, warned Washington could impose tariffs and other restrictions on European companies after the European Commission’s recent fines and probes and after Donald Trump began formally challenging EU digital enforcement.Greer named potential targets including Accenture, Amadeus, Capgemini, DHL, Mistral, Publicis, SAP, Siemens and Spotify and pressed the United Kingdom to abandon a proposed 2 percent digital revenues tax expected to raise just over $1 billion a year.The threats follow intensified enforcement under the AI Act, the Digital Services Act and the Digital Markets Act — including a €2.95 billion Google penalty, fines on X, Apple and Meta and ongoing probes — which Brussels says apply neutrally while U.S. officials call them discriminatory and warn of reciprocal trade measures.