Patrick Berry advocates a light touch:

The overall picture is one of an Iranian economy that is heavily straight jacketed already. The current government is largely to blame. Based on the regime's track record of incompetence and the consequences of that incompetence for the Iranian economy, the U.S. would be wise to take a step back, allowing Iran to continue on its present course. As its position grows weaker, the U.S. position would grow stronger, shoring up American diplomatic leverage or at least making Iran easier to contain or deter. The U.S. would also sidestep accusations that its policies had contributed further hardship to the Iranian people. Congress is searching for the most effective means to weaken the Iranian economy; the best approach may be for it to do nothing at all.

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