Taiwan, Mexico, the European Union and Vietnam have benefited from the U.S. imposition, over a year ago, of tariffs on China imports, a new report published by the United Nations' trade arm says, with diversions in the first half of 2019 amounting to an estimated $21 billion. The report says that, in the January-June period, tariffed-product imports from China declined 25 percent. That number underscores “the competitiveness of Chinese firms, which despite the substantial tariffs” were still able to maintain...