Many countries thought they were negotiating in good faith. The White House renewed its “reciprocal” tariff plan anyway, giving countries until Aug. 1 to make offers.

WASHINGTON—President Trump reignited his global trade war Monday, renewing his threat to hit partners with punishing tariffs even as he announced a three-week extension to negotiate deals. Trump signed an executive order extending the date when his so-called reciprocal tariffs would take effect,