Why the Cease-Fire With Iran Keeps Crumbling

What It Covers

NYT correspondent David Sanger analyzes why the US-Iran ceasefire, signed by VP JD Vance in mid-June 2025, collapsed within weeks. The breakdown centers on ambiguous Strait of Hormuz language, fundamental misreading of Iranian motivations, and the Trump administration's return to a naval blockade of Iranian ports.

Key Questions Answered

• •Ceasefire drafting failure: Paragraph five of the memorandum of understanding used the phrase "best efforts for safe passage" without defining what "open strait" meant across its three distinct channels — Iranian coastal, central, and Omani. Iran exploited this gap to open only the channel inside its own territorial waters, where it could impose tolls, while the US assumed full restoration of pre-war traffic.
• •Negotiator experience gap: The Trump administration assigned the Iran talks to VP Vance, Jared Kushner, and Steve Witkoff — negotiators with real estate backgrounds who had no prior experience with Iranian diplomatic counterparts. Veterans of the Obama-era nuclear talks flagged the ambiguous strait language immediately upon publication, predicting exactly the breakdown that followed within three weeks.
• •Iran's two-step leverage playbook: Iran operates a consistent pressure sequence against the US: first, restrict or close the Strait of Hormuz to spike global energy prices; second, launch missiles and drones at US military bases in neighboring Arab states to raise the cost of regional presence. Understanding this pattern is essential for anticipating Iranian escalation responses to any future US military or economic pressure.
• •Iran's ideological vs. economic calculus: The administration modeled Iran as a rational economic actor that would trade its nuclear program for sanctions relief and oil revenue. This misread a 47-year revolutionary government whose core identity is built on opposition to US influence. Iran's leadership framed surviving the conflict as a nationalist victory, making pride and sovereignty non-negotiable in ways that purely transactional deal frameworks cannot accommodate.
• •Strait closure as a depreciating weapon: Iran's control over Strait of Hormuz traffic is a time-limited asset. Saudi Arabia has already reactivated a dormant pipeline to route oil around the strait, and other nations are developing alternative energy supply chains. Iran's strategic window to extract maximum leverage from strait closure is narrow, which explains the urgency of deploying it now despite long-term diminishing returns.