Oil prices jumped about 5% Monday as doubt grew that the U.S. and Iran will reach a deal to increase ship traffic through the Strait of Hormuz. U.S. West Texas Intermediate futures climbed about 5% to close at $82.13 per barrel. Brent crude , the international benchmark, also settled around 5% higher at $87.72 a barrel. President Donald Trump told Axios on Sunday that the U.S. is “only semi-negotiating” with Iran, after he insisted last week that Washington and Tehran were in fact holding talks. Trump indicated that he would rely on the U.S. naval blockade to pressure Tehran rather...