The nuclear summit is underway in Washington, D.C. An air of unreality pervades because the greatest nuclear threat of our time goes unaddressed. At times, the degree to which Obama evades the Iranian issue is jaw-dropping. This report explains:

“The central focus of this nuclear summit is the fact that the single biggest threat to U.S. security — both short term, medium term and long term — would be the possibility of a terrorist organization obtaining a nuclear weapon,” Obama said Sunday afternoon. “If there was ever a detonation in New York City, or London, or Johannesburg, the ramifications economically, politically and from a security perspective would be devastating. And we know that organizations like al-Qaeda are in the process of trying to secure a nuclear weapon — a weapon of mass destruction that they have no compunction at using.”

Actually, the single greatest threat — and the most likely means for a terrorist organization to possibly obtain a nuclear weapon — is the mullahs’ nuclear program. About that, the president offers the moral power of example (i.e., our own disarmament) and watered-down sanctions.

Neither Obama’s credibility nor America’s deterrent capability was enhanced by either the START treaty or the Nuclear Posture Review. So Hillary Clinton and Robert Gates took to the airwaves Sunday to assure us that the Obami really weren’t doing great damage to our national security. Hillary seemed to fudge on the “no nuclear response to a NPT signtory’s attack” when she tried to bluster her way through her interview on Face the Nation:

SCHIEFFER: Are non-nuclear weapons so good now, Madam Secretary, that we don`t have to rely on nuclear weapons anymore?

CLINTON: We rely on both, Bob. And I think that`s the point that Secretary Gates is making. We`ve maintained a strong, robust nuclear deterrent as set forth in the nuclear posture review. But we have also in this administration moved toward a global strike capability to enhance our conventional response.

And we have an enormous amount of firepower conventionally. And it is also clear that this is putting everybody on notice. We don`t want more countries to go down the path that North Korea and Iran are. And some countries might have gotten the wrong idea if they looked at those two over the last years. And so we want to be very clear. We will not use nuclear weapons in retaliation if you do not have nuclear weapons and are in compliance with the NPT.

But we leave ourselves a lot of room for contingencies. If we can prove that a biological attack originated in a country that attacked us, then all bets are off, if these countries have gone to that extent. So we want to deal with the nuclear threat first and foremost, because that’s the one that we face right today.

All bets are off? Well, the nuclear option is, if we believe the Nuclear Posture Review. But maybe it doesn’t say what we mean. Or maybe it’s getting increasingly hard to figure out whether we are serious about deterring rogue states or not. Indeed, the administration is increasingly flighty and obtuse, making it hard to parse the often inconsistent rhetoric. Iran’s nuclear bomb would be unacceptable, but maybe we can’t do anything about it. The greatest threat is a terrorist organization with a nuclear bomb, but we’re increasingly lackadaisical about denying one to the most active state sponsor of Islamic terrorists. We aren’t going to retaliate against an NPT signatory after a devastating chemical or biological attack, but who knows.

If there is any rhyme or reason to this, it no doubt eludes both friends and foes. It does, however, convince many that this president doesn’t really appreciate how to project American strength and keep our adversaries at bay. The summit, therefore, promises not only to be irrelevant but also counterproductive to our national-security interests.