The White House push to confront rivals over trade has spread beyond the world’s biggest economies such as China and Europe to include poorer countries that also see the U.S. as a critical market for their goods.
Since President Trump took office 18 months ago, the U.S. Trade Representative has launched wide-ranging reviews of the eligibility of less-developed countries for a federal government program that lowers tariffs for thousands of the products they export to the U.S.