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Iran Update, September 23, 2026

ISW · Institute for the Study of War ·

Executive Summary

Iran's deteriorating economy and challenges in controlling the Strait of Hormuz are driving its renewed engagement with the US, though it remains unwilling to make significant concessions. Meanwhile, Houthi forces are attempting to deter US and Saudi partners from intervening in their conflict with Saudi Arabia, threatening to expand their naval blockade. In Iraq, Iranian-backed militias are likely to exploit a government plan to disarm them, indicating their intent to remain armed.

Why It Matters

This document provides critical insights into the complex geopolitical dynamics of the Middle East, including Iran's strategic calculations, Houthi military threats, and the persistent challenge of Iranian-backed militias in Iraq, all of which directly impact regional stability and US interests.

Key Takeaways

  • Iran's economic pressures and difficulties in controlling the Strait of Hormuz are prompting renewed, but uncompromising, engagement with the United States.
    Source evidence · PDF page 2
    Iran·s deteriorating economy and apparent difficulties exerting control over the Strait of Hormuz may have contributed to Iran·s recent willingness to engage with the United States. Iran·s renewed engagement with the United States does not indicate that the regime has softened its negotiating position or is willing to make meaningful concessions on core demands.
  • The Houthis are actively threatening to expand their naval blockade to include US and Saudi partner vessels to deter military intervention in their conflict with Saudi Arabia.
    Source evidence · PDF page 3
    The Houthis are attempting to deter the United States and other Saudi partners from any external response that would support Saudi Arabia against the Houthis.
  • Iranian-backed Iraqi militias are expected to circumvent an Iraqi government plan to disarm them, maintaining their armed status and influence.
    Source evidence · PDF page 5
    The Shia Coordination Framework, which includes multiple Iranian-backed Iraqi actors, has reportedly approved some details of an unfinalized Iraqi government plan to disarm Iranian-backed Iraqi militias by June 2027. The Iraqi militias will almost certainly exploit certain provisions of Iraqi Prime Minister Ali al Zaydi·s plan to retain their arms.

Strategic Relevance

The report highlights ongoing regional tensions, including Iran's strategic maneuvering under economic pressure, the Houthi's assertive posture in critical maritime chokepoints, and the enduring challenge of Iranian proxy forces in Iraq. These factors have significant implications for maritime security, energy markets, and the broader balance of power in the Middle East.

Source Website View PDF

Key Entities

IranUnited StatesHouthisSaudi ArabiaIraqShia Coordination FrameworkStrait of HormuzBab al MandebIranian-backed Iraqi militiasInstitute for the Study of War (ISW)Critical Threats Project (CTP)Mohsen Rezaei

Best For

Policy MakersIntelligence AnalystsGeopolitical StrategistsMiddle East Specialists

Related Themes

Regional SecurityMaritime SecurityProxy WarfareEconomic WarfareUS Foreign PolicyIranian Influence

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