Mr. President, take “yes” for an answer. On Monday, as the fallout from Liberation Day continued to rile markets, the European Union surrendered. “We have offered zero-for-zero tariffs for industrial goods,” European Commission President Ursula von der Leyen said. That would lower the price of pharmaceuticals, cars and other products that American companies export to the EU. It’s exactly the sort of agreement that would make President Trump’s tariff wars a success — forcing nations to make better deals for our workers. And if the agreement isn’t perfect, it’s at least a starting point. But is the administration even answering...