Iran: Are Sanctions Working?

The president thinks so:

The sanctions were designed to exploit Iran's over-reliance on its paramilitary force, the IRGC, for ways to evade the sanctions, and to prevent its oil industry from obtaining the foreign investment necessary for development. A U.S. official said that Iran was recently forced to abandon an effort to develop an oil field because the IRGC didn't have the expertise and the country could find no subcontractors who were willing to risk the penalties imposed by the...