The USA and the EU have had a close relationship since World War II, but in recent years, the transatlantic relationship has deteriorated significantly. With Donald Trump back in the corridors of power, everything points to further challenges in the cooperation. He has already threatened tariffs on the EU, suggested conquering Greenland from Denmark, and hinted that he may withdraw American support for Ukraine. The big question in Brussels now is not only how the EU can act more independently but also how the union should deal with an increasingly aggressive superpower. The future of Europe's economy and security is uncertain, but during the seminar "Trump and Europe: Choices for the European Union," three experts attempted to provide some clues about what is to come.