Laura Rozen has a good post on some Harvard war games about new unilateral sanctions on Iran ultimately proving counterproductive to getting the Iranian regime
“„The US team went to work with a vengeance to get a consensus on sanctions. This didn’t bother the Iran team in the least. We didn’t think they could put together a package that would hurt us in any serious way, and that proved to be true. But more important, in the process they managed to offend all of their ostensible allies and wasted so much time and effort that Iran was better off at the end than they had been at the beginning. Since this represents a version of actual US strategy (and its results) over now three administrations, I think there is a lesson there that is ignored at our peril.