Germany’s Vice Chancellor and Finance Minister, Lars Klingbeil, is pushing back against President Donald Trump amid the tenuous situation involving Denmark, Greenland, and Trump’s proposed tariffs against European nations.

Speaking to the media on Monday morning, Klingbeil encouraged the European Union not to be reluctant to use retaliatory measures against the United States if tariffs were implemented. He stressed that Europe must make the U.S. aware that the “limit has been reached.”