First off, Bill Burton made the statement. Secondly, the statement refered to a specific policy Rudy and her nibs held in common.

Your post is deliberatly misleading and you know it.

I cannot support the Kyl-Lieberman amendment on Iran. To do so could give this President a green light to act recklessly and endanger US national security.

And I await your diary condemning Hillary Clinton for this:

And I invite all of our colleagues to pass something immediately that makes it very clear he has no authority and we will not permit him to go take offensive action against Iran.

Obama:

To prevent this worst-case scenario, we need the United States to lead tough-minded diplomacy.

This includes direct engagement with Iran similar to the meetings we conducted with the Soviets at the height of the Cold War, laying out in clear terms our principles and interests. Tough-minded diplomacy would include real leverage through stronger sanctions. It would mean more determined U.S diplomacy at the United Nations. It would mean harnessing the collective power of our friends in Europe who are Iran's major trading partners. It would mean a cooperative strategy with Gulf States
who supply Iran with much of the energy resources it needs. It would mean unifying those states to recognize the threat of Iran and increase pressure
on Iran to suspend uranium enrichment. It would mean full implementation of U.S. sanctions laws. And over the long term, it would mean a focused
approach from us to finally end the tyranny of oil, and develop our own alternative sources of energy to drive the price of oil down.

He clearly thinks diplomacy is the solution.  And this is in front of AIPAC, mind you.

Now, Clinton:

And what do I mean by engagement or some kind of a process? Well I'm not sure anything positive would come out of it, I have no expectations whatsoever. But there are a number of factors that I think argue for some attempt to do what I am suggesting: number one I don't think we know enough about how Iranian society and their government really functions. I was struck by the rejection of the President's party in those recent elections. If we are having to pursue potential action against Iran beyond enforcing the toughest sanctions that we can and bringing the world community along as hard as it is, to recognize the danger to them as well as to us and to Israel then I want to know more about the adversary we face. I want to understand better what the leverage we can bring to bear on them will actually produce. I want to get a better sense of what the real power centers and influentials are. And I also want to send a message if we ever do have to take war, drastic action to the rest of the world that we exhausted all possibilities because we need friends and allies to stand with us as we stand with Israel in this long war against terrorism and extremism .

Obama talks about how diplomacy can work.  Clinton operates from the premise that diplomacy probably won't work.

And I just wrote on Obama and Iran again.