President Donald Trump announced a trade agreement on Sunday with the European Union that would lower tariffs to 15%, ending what had been months of uncertainty surrounding trade with the United States’ largest trade partner. The tariff rate is a reduction from the 30% that Trump threatened on July 12 and the 20% he said he would impose on April 2. Announcing the agreement, Trump said the E.U. will not impose a tariff on U.S. imports. He added this agreement was “satisfactory to...