OPEC built a case on Tuesday for cutting oil output when it meets next month, warning that a supply glut could emerge in 2019 as the world economy slows and rivals increase production more quickly than expected. Worried by a drop in oil prices and rising supplies, OPEC is talking again of reducing production just months after increasing it. Such a shift would anger U.S. President Donald Trump, who on Monday urged OPEC not to cut supply. In a monthly report, the Organization of the Petroleum Exporting Countries said world oil demand next year would rise by 1.29 million barrels per day, 70,000 bpd less than predicted last month and the fourth consecutive reduction in its forecast. Oil prices have dropped steeply […]