U.S. President Donald Trump said the prospect of global economic collapse was a big reason he signed an interim peace deal with Iran. That admission exposes a key U.S. weakness heading into the next round of talks with Tehran.

The memorandum of understanding that Trump signed on Wednesday reopened the Strait of Hormuz and set in motion waivers for sanctions on Iran¡¯s oil sales to the international market. The effect was immediate: The price of oil tumbled further and U.S. stocks rose, facts that Trump pointed out at a news conference in France last week.

¡°I didn¡¯t want to see economic catastrophe,¡± Trump said at a news conference in Evian, France on Thursday. ¡°If you kept this going, that could¡¯ve happened.¡±

That acknowledgment undercuts the U.S. negotiating position as the two sides launch talks in Switzerland on Sunday. Under the deal, they have 60 days to discuss imposing limits on Iran¡¯s nuclear program and granting Iran economic relief. Knowing that Trump will be reluctant to restart the military campaign ¡ª and thus spark fresh economic turmoil ¡ª eases the pressure for Iran to end the talks quickly.

Indeed, even before the talks opened, Iran on Saturday announced it was closing Hormuz in response to new strife between Israel and Lebanon.

The pressure on the U.S. may only get worse. A prolonged conflict could trigger the deepest global slowdown in 40 years. At home, the war in Iran has proved deeply unpopular, with 56% of Americans saying it has impacted U.S. interests more negatively than positively, according to a poll from the University of Maryland.?

With midterm elections approaching in November, members of Trump¡¯s own party are raising concerns and the Republican-led House even voted to halt the war with Iran earlier this month.?

¡°Taken as a whole, the 14 points in the MOU put Tehran in a strong negotiating position as the two sides tackle the nuclear file,¡± said Chris Kennedy, the economic statecraft lead at Bloomberg Economics and a former State Department official.?

While U.S. officials have previously insisted that Iran¡¯s nuclear program was important enough to justify going to war, Vice President JD Vance suggested this week it was already destroyed and appeared almost ambivalent about insisting the nuclear negotiations yield a breakthrough for Washington.

¡°Iran is weakened, their nuclear program destroyed, their economy in desperate straits, and if they change their behavior, big things are going to happen for Iran and for the war,¡± Vance said. ¡°If they don¡¯t, no skin off our backs.¡±

The problem for the U.S. is that the deal was skewed in Iran¡¯s favor, giving the country broad gains before the next round of talks even begin. A Bloomberg Economics...