Iranian oil exports will slide in May as the United States tightens the screws on Tehran’s main source of income, industry sources said, deepening global supply losses caused by U.S. sanctions on Venezuela and OPEC-led cuts.  The United States reimposed sanctions on Iran in November after pulling out of a 2015 nuclear accord between Tehran and six world powers. Those sanctions have already more than halved Iranian oil exports to 1 million barrels per day (bpd) or less. Washington, aiming to cut Iran’s sales to zero, said all sanctions waivers for those importing Iranian oil would end this week. Iran says this will not happen, although its officials are bracing for a drop in supplies. One Iranian official familiar with oil policy said exports could drop to 700,000 bpd […]