The clearest sign of the administration's restraint is what it has not done: target Iran’s biggest buyer of oil, China. If it did, oil prices might rise higher still. Chinese refiners buy Iranian oil, and the country has used its vast market power to keep energy prices in check.
Moving from bombing campaigns to economic pressure may ease the military risks for Trump, who says the conflict is necessary to stop Iran from acquiring a nuclear bomb, but it is not clear how it will help his Republican Party defend narrow majorities in Congress in November's midterm elections.
Voters continue to oppose the war and fault Trump’s management of the economy. Gasoline prices remain elevated, nearly $1 a gallon higher than a year ago. Trump’s approval rating has fallen from 40% to 33% since the war started, Reuters/Ipsos polling shows, marking the lowest of either of his terms in office.
Trump may be looking for an exit ramp from his detour in Iran. Six months after the conflict began, it is not clear that he controls the route out.