Donald Trump’s tariffs are a headache for all his trade partners. But the U.S. president’s plan to impose ad hoc “reciprocal” levies on imports are a particular problem for the European Union. By enabling him to target whichever countries in the bloc he pleases,

EU trade chief Maros Sefcovic said Thursday that reciprocity in tariffs should be made to work for both the bloc and Washington, after talks with his counterparts in US President Donald Trump's administration.