President-elect Trump says he will impose tariffs on foreign products, to raise revenue and in response to practices that give foreign manufacturers unfair advantages over American companies. Europe’s debates over similar issues offer relevant guidance, advisories and impetus.

As the European Union looks ahead to the next five-year term of its new European Commission and Parliament, officials talk about playing “its full part on the world stage in geopolitics.” Europe and the world heard it before, when Ursula von der Leyen promised a “geopolitical Commission” at the start of her first presidential term in Brussels in 2019. It didn’t happen then, and it’s not likely to happen now.