US Pressure on Iran's Oil Exports Intensifies Economic Strain

The U.S. campaign to curb Iran's oil exports and prevent sanctions evasion has taken a toll on Tehran's economy, according to three senior Iranian sources.

The pressure from Washington has intensified in recent weeks as part of an effort to secure concessions in any future negotiations that six months of conflict have not achieved.

Iran's clerical rulers have long bypassed sanctions, but the latest U.S. measures have left the country with fewer channels to obtain foreign currency and purchase goods, the sources said.