Can you identify the US politician who uttered these quotes?

1. You know, deterrence worked during the Cold War in large measure because the United States made it clear to the Soviet Union that there would be massive retaliation. We have to make it clear to those states that would give safe haven to stateless terrorists, that would launch a nuclear attack against America that they would also face a very heavy retaliation.

2. Presidents should be very careful at all times in discussing the use or nonuse of nuclear weapons. Presidents since the Cold War have used nuclear deterrence to keep the peace. And I don't believe that any president should make any blanket statements with respect to the use or nonuse of nuclear weapons.

3. U.S. policy must be clear and unequivocal. We cannot, we should not, we must not, permit Iran to build or acquire nuclear weapons. And in dealing with this threat as I have said for a very long time, no option can be taken off the table.

The answer is _Hillary Clinton_ (Highlight the area between the two underscores to see the answer).