The Israelis want Iran’s nuclear program destroyed, but they do not want to be the ones to try to do it. Only the United States has the force needed to carry out the strike conventionally. But like the Bush administration, the Obama administration is not confident in its ability to remove the Iranian program surgically. Washington is concerned that any air campaign would have an indeterminate outcome and would require extremely difficult ground operations to determine the strikes’ success or failure. Perhaps even more complicated is the U.S. ability to manage the consequences, such as a potential attempt by Iran to close the Strait of Hormuz and Iranian meddling in already extremely delicate situations in Iraq and Afghanistan. As Iran does not threaten the United States, the United States therefore is in no hurry to initiate combat. And so the United States has launched a public relations campaign about defensive measures, hoping to affect Iranian calculations while remaining content to let the game play itself out.
Israel’s option is to respond to the United States with its intent to go nuclear, something Washington does not want in a region where U.S. troops are fighting in countries on either side of Iran. Israel might calculate that its announcement would force the United States to pre-empt an Israeli nuclear strike with conventional strikes. But the American response to Israel cannot be predicted. It is therefore dangerous for a small regional power to try to corner a global power.
With the adoption of a defensive posture, we have now
seen the U.S. response to the February deadline. This response closes off no U.S. options (the United States can always shift its strategy when intelligence indicates), it increases the Arabian Peninsula’s dependence on the United States, and it possibly causes Iran to recalculate its position. Israel, meanwhile, finds itself in a box, because the United States calculates that Israel will not chance a conventional strike and fears a nuclear strike on Iran as much as the United States does.
In the end, Obama has followed the Bush strategy on Iran — make vague threats, try to build a coalition, hold Israel off with vague promises, protect the Arabian Peninsula, and wait — to the letter. But along with this announcement, we would expect to begin to see a series of articles on the offensive deployment of U.S. forces, as good defensive posture requires a strong offensive option.