How could US-Iran conflict end? Three experts give their views

Jason Campbell, Senior Fellow at the Middle East Institute, Washington DC

The problem is we still do not know definitively what the US strategic objectives are in Iran. The White House is persistently re-evaluating what it is willing to live with from a political standpoint.

It was assumed the military component would be enough for a quick victory and that has not had the desired effect.

What we are seeing is different levers - both military and economic - that the US is trying to pull at.

Right now, the administration appears satisfied with some form of statis. I think they are satisfied with maintaining the blockade and with allowing some periodic targeting against Iran's capability to upset the shipping lane in the strait.

US officials are hopeful that the new sanctions will be enough to compel the Iranian regime to come to the negotiating table in a weaker position.

US forces have seemingly been able to facilitate a sufficient trickle through the Strait of Hormuz in recent days to avert an oil-price shock or a global economic collapse. But those were not the US objectives when starting the war.

My sense is that Iran is likely to demand a high price to get to a resolution, which is likely to remain politically untenable for the Trump administration.

Dr Aniseh Bassiri Tabrizi, Associate Fellow with Chatham House's Middle East and North Africa Programme, London

I do not think the latest strikes really alter Iranian calculations on the war. I think Tehran is preparing for an increased squeeze on its economy, and a continuation of the on and off attacks which we have seen over the past couple of months. Their intent will be to respond to these attacks in a proportionate manner in order not to spiral a larger conflict.

On the economic side, obviously this is likely to hurt the Iranian economy which has already been affected by the war and has had underlying structural issues anyway, as we know from the December and January demonstrations in Iran.

But I do not feel like there is the sense from the Iranian side that the economic squeeze is going to alter the Iranian calculation any time soon, including on any negotiations.

That does not mean Iran is not looking for an off ramp, but I think what we are seeing is that it is waiting for the US to go back to the MoU, or to at least offer some sort of concession. Tehran does not want to cave in to US pressure or alter its own approach in response to sanctions or additional attacks.

Nicholas Hopton, Distinguished Fellow in international security at the Royal United Services Institute think tank in London and former UK ambassador to Iran

The latest spike in military action is not going to produce Iran's capitulation - it is just the latest twist. Economic pressure is also unlikely to work because China, Russia and many other countries which trade with Iran are not going to support unilateral US sanctions.

Iran can continue to disrupt the Strait of Hormuz - they have a thumb on the jugular of the global economy.

What is the White House's exit strategy?

Well, the US has already found it. If Trump was able to put a sustained effort into negotiating the deal outlined in June's MoU, that is the off-ramp.

Not only would a deal give the US a kind of victory because it would weaken the hardliners in the Islamic Republic, but also reassure everyone that Iran is not going to get a nuclear weapon.

There is a silver bullet in the MoU which is the lifting of all US sanctions on Iran.

What lifting those sanctions would do over time is weaken Iran's powerful Islamic Revolutionary Guard Corp (IRGC). Economic engagement between the outside world and Iran in a new way would gradually force radical political and social change - so you end up with an Islamic regime, but of a very different nature.

Of course, that would not be straightforward to achieve, because of extensive IRGC penetration of the Iranian economy. But it should work, if given enough time and if the US and its partners exercised strategic patience which, sadly, is in short supply at this point.

For the time being, I think we're going to carry on with a messy, inconclusive situation that is bad for everyone.