The US trade agreement with Vietnam reportedly lowers tariffs but lacks detail, triggering sharp warnings from Chinese officials.

SINGAPORE—A tariff agreement with Vietnam emphasizes one of the White House’s top priorities in this frantic round of dealmaking over global trade: Slamming shut any back door routes for Chinese goods to enter the U.

Against a ticking clock, President Donald Trump said Wednesday the United States has reached a trade agreement with Vietnam, pulling off the administration’s third significant deal ahead of a self-imposed July 9 deadline.