Romney seems eager to tie himself to the administration position on Iran:

Acknowledging some good news in a recently released National Intelligence Estimate saying Iran stopped actively pursuing nuclear weapons in 2003, Mitt Romney said the country remains a threat, even with only a peaceful nuclear energy program. “They, of course, are continuing making the ingredients which would be used in a nuclear weapon,” Romney told Politics Nation today. “If they had stopped both I would feel a great deal more confident about their intentions. But their continuing to produce enriched uranium is of great concern to the world.”

Essentially, Romney’s position is that sanctions have worked, so he concludes that continuing to engage in punitive sanctions is obviously the thing to do.  In other words, Iran should be punished when we think they’re developing nuclear weapons, and Iran should be punished when we know with some confidence that they aren’t.  Apparently, Iran should always be punished.  That pretty well sums up Romney’s views.  You can imagine that he would say the same thing if Iran gave up the fuel cycle all together: “They might start up a program in the future, so they’re still a threat, if only in my mind.” 

Romney made clear that the NIE would not have too much influence on his thinking about Iran:

My perspective on matters of importance is that you don’t look for a homogenized view. You look for people who have different perspectives and you want to listen to the debate between them and see the basis of their thinking.

In short, he will listen to more accurate information as well as listening to nonsense as if they were equally valid sources.