Should it be U.S. policy now to treat an Iranian attack on Israel as if it were an attack on the United States?
MR. STEPHANOPOULOS: Senator Obama, let's stay in the region. Iran continues to pursue a nuclear option. Those weapons, if they got them, would probably pose the greatest threat to Israel. During the Cold War, it was the United States policy to extend deterrence to our NATO allies. An attack on Great Britain would be treated as if it were an attack on the United States. Should it be U.S. policy now to treat an Iranian attack on Israel as if it were an attack on the United States?
SEN. OBAMA: Well, our first step should be to keep nuclear weapons out of the hands of the Iranians, and that has to be one of our top priorities. And I will make it one of our top priorities when I'm president of the United States.
I have said I will do whatever is required to prevent the Iranians from obtaining nuclear weapons. I believe that that includes direct talks with the Iranians where we are laying out very clearly for them, here are the issues that we find unacceptable, not only development of nuclear weapons but also funding terrorist organizations like Hamas and Hezbollah, as well as their anti-Israel rhetoric and threats towards Israel. I believe that we can offer them carrots and sticks, but we've got to directly engage and make absolutely clear to them what our posture is.
Now, my belief is that they should also know that I will take no options off the table when it comes to preventing them from using nuclear weapons or obtaining nuclear weapons, and that would include any threats directed at Israel or any of our allies in the region.
MR. STEPHANOPOULOS: So you would extend our deterrent to Israel?
SENATOR OBAMA: As I've said before, I think it is very important that Iran understands that an attack on Israel is an attack on our strongest ally in the region, one that we -- one whose security we consider paramount, and that -- that would be an act of aggression that we -- that I would -- that I would consider an attack that is unacceptable, and the United States would take appropriate action.