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The Strait of Hormuz is the only navigable exit for tankers leaving Persian Gulf ports, a maritime chokepoint with no alternative route.
The Trump administration publicly insisted it remains open, and US forces launched another round of strikes on Iran while a potential ceasefire continued to teeter.
The constraint: what a closure declaration means in practice Whether Iran can enforce a closure is a separate question from whether Iran has declared one.
Enforcement requires the capacity to threaten or interdict commercial shipping at scale, sustained against US naval opposition.
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