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John Mearsheimer: US Pullback, Alliance Breakdown and Wars (Transcript)

In this interview with Glenn Diesen, University of Chicago professor John Mearsheimer explains why the United States is avoiding escalation with Iran in the Strait of Hormuz and what the final US withdrawal from Iraq means for America’s security umbrella over the Gulf states. He also discusses buck-passing, Israel’s influence on US Middle East policy, the nuclear question, and the growing danger of a war between Europe and Russia as the US pulls back from its alliances. This interview was premiered on October 1, 2026.

TRANSCRIPT:

Is the US Escalating With Iran?

GLENN DIESEN: (00:00:01 – 00:00:36) Welcome back. We are joined today by John Mearsheimer, a professor at the University of Chicago, to discuss what is happening now in the Middle East. I’m glad to see you because this is quite confusing to me. We see Trump at the United Nations threatening to annihilate Iran after the midterms. At the same time, we see huge movement of arms. The US just pulled out of Iraq after 23 years. Well, how are you interpreting all of these events? Are we looking at an escalation, or is there any other way of looking at this?

JOHN MEARSHEIMER: (00:00:38 – 00:04:28) Well, with regard to the question of escalation, it appears that the United States has no interest in escalation. And the best evidence of that is that the Iranians have been attacking ships in the Strait of Hormuz. In a quite vigorous way over the past few days. And according to news reports today, the Iranians claim that they hit 4 ships overnight, and yet the United States is not retaliating.

In the past, this would have led to a tit-for-tat strategy where the Iranians attacked vessels in the strait, and then the United States responded against targets in Iran, and then the Iranians responded against targets inside of countries like Saudi Arabia, Kuwait, and so forth and so on, where you had American military bases. But so far, we have not seen any evidence of that. For quite a few weeks now, the United States has stayed away from going up the escalation ladder militarily.

The Iranians themselves are a different question. There’s all sorts of evidence that more oil is now coming out of the Strait of Hormuz. And apparently, that is somewhat weakening Iran’s bargaining position. And many people are hypothesizing that the Iranians really don’t have much choice but to escalate.

For example, it’s quite clear that a lot of oil is being loaded in Ras Tanura, which is the principal port in Saudi Arabia. Earlier in September, earlier in this month, there were about 1.5 million barrels a day being loaded onto tankers at Ras Tanura. That’s 1.5 million in early September. It appears that now about 6.5 million barrels a day are being loaded onto tankers at Ras Tanura. Well, it is possible. I’m not saying that this is likely, but it is possible that the Iranians could decide to hit Ras Tanura to restore their leverage over the United States in this conflict.

So what’s going on here is that people do not see evidence that the Americans are interested in escalating. At least at this point in time. And they do see lots of evidence that the Iranians have an incentive, a powerful incentive to escalate, and that there are targets the Iranians can go after, like Ras Tanura or the pipeline that goes across Saudi Arabia that was shut down for a while but now is operating at 40% capacity and is on its way to being restored to full capacity. So the Iranians could go after the pipeline as well as Ras Tanura. And there are, of course, other targets in places like the UAE and Kuwait as well. And of course, the Iranians will surely continue to target vessels that are trying to go through the Strait of Hormuz.

So that’s the basic situation as things stand today. With regard to escalation, but as you know, Glenn, what the situation will look like in a week’s time is hard to say because this war has great potential to escalate on both sides.

Buck-Passing in Europe and the Gulf

GLENN DIESEN: (00:04:31 – 00:05:25) That’s a good point. Next week, the world can look very different already. I was wondering how you see the wider U.S. strategy, though, because you use concepts like buck-passing, that is to have, shift the cost of war to someone else. And I was wondering if you see any of this now in the US strategy, because certainly in Europe, we’ve seen some of this, the desire to essentially put the Ukraine war on the shoulders of the Europeans, that they have to finance this.

And we heard similar reports in the Middle East that the US has been seeking for countries like Saudi Arabia to take more of a direct role. Do you think there might be Again, to be honest, the US also asks Europe to take greater responsibility in the Middle East. But do you think this is something the US might try, or has this option been exhausted by now? That is, make its frontline states carry the weight.

JOHN MEARSHEIMER: (00:05:26 – 00:09:02) Yeah, just to talk about Europe for a second, what’s going on there is that the United States is trying to buck-pass to the Europeans and get the Europeans to be principally responsible for supporting Ukraine. So that the Americans can back off as much as possible. And in that case, the Americans have a partner that they can buck-pass to. The Europeans are deeply committed to the Ukraine war, and they are willing to allow the United States to buck-pass to them. So it works there.

But the question you have to ask yourself with regard to the Gulf, and the Iran War is who can the United States pass the buck to? I mean, the Saudis, the UAE, Kuwait, none of these countries are capable of picking a fight and winning a fight with Iran.