Iran’s worsening economic crisis has opened an increasingly bitter argument over who is responsible, as the government points to outside pressure and market psychology while hardliners accuse Tehran’s own economic officials of making the situation worse. On Thursday, the end of Iran’s market week, the rial fell to another record low. Year-on-year inflation has reached almost 90 percent, with food prices rising even faster. The deterioration comes as US sanctions and a naval blockade squeeze Iran’s sources of revenue. The blockade has severely constrained oil exports, while Washington on Thursday expanded sanctions into the automotive and rail sectors, targeting some...