I hope this gets some coverage at the next debate:

The United States and Iran have agreed in principle for the first time to one-on-one negotiations over Iran’s nuclear program, according to Obama administration officials, setting the stage for what could be a last-ditch diplomatic effort to avert a military strike on Iran.

Iranian officials have insisted that the talks wait until after the presidential election, a senior administration official said, telling their American counterparts that they want to know with whom they would be negotiating.

…

Beyond that, how Mr. Romney responds could signal how he would act if he becomes commander in chief. The danger of opposing such a diplomatic initiative is that it could make him look as if he is willing to risk another American war in the Middle East without exhausting alternatives.

“It would be unconscionable to go to war if we haven’t had such discussions,” said R. Nicholas Burns, who led negotiations with Iran as under secretary of state in the George W. Bush administration.