Why the Strait of Hormuz Is Blocking a Wider U.S.-Iran Deal

The June Memorandum of Understanding called for an end to military operations, a permanent peace agreement and progress on Iran’s nuclear program, but detailed nuclear talks have not begun and the two sides remain divided over the Strait of Hormuz.[4][5] Iran wants the U.S. blockade lifted, American forces withdrawn and war reparations paid, while claiming a controlling role over the strait; Trump rejects those demands and is relying on sanctions and the blockade for leverage.[5] Oman and Iran said they had reached an understanding on ship transit, but Trump threatened the U.S. ally if it obstructed Washington’s own effort to secure the waterway’s reopening.[1] Why it matters: The strait normally carries about one-fifth of the world’s oil and liquefied natural gas, while current traffic remains only a small fraction of its prewar level.[1][5] Continued closure therefore links an unresolved military and nuclear confrontation directly to fuel prices, trade flows and relations between Washington and Gulf partners.[1][5] Key insights: The interim agreement’s ambiguous language gave Iran a role in facilitating traffic, which Tehran has used to argue that it can control the strait and potentially charge transit fees.[5] | The ceasefire framework broke down after both sides resumed strikes, and Trump said on Monday that he would not seek an extension of the 60-day memorandum.[1] | Iran says direct negotiations stopped in June, although messages have continued through intermediaries; Trump maintains that talks are ongoing.[5] | Oman’s position is unusually sensitive because it borders the strait, presents itself as neutral, has suffered Iranian strikes and is negotiating separately with Tehran.[1] Cheatsheet facts: What changed: The 60-day deadline expired without a peace or nuclear accord, and Trump rejected an extension as Oman and Iran moved toward a separate transit arrangement.[1][4][5] | Why now: The interim framework failed to settle control of the Strait of Hormuz, the U.S. blockade or reparations, leaving the waterway as the immediate bargaining point.[1][5] | Watch next: Watch for the promised Oman-Iran joint statement detailing ship-transit terms and for any sustained increase in traffic through the strait.[1][5]