The Islamabad talks lasted 21 hours. They produced nothing. Within hours of JD Vance’s plane leaving Pakistani airspace, Trump declared the US Navy would impose its own naval blockade of the Strait of Hormuz, stopping all ships from entering or leaving and intercepting ships that paid tolls to Iran. The move was framed as escalation. In strategic terms, it is the opposite — a sign that Washington’s toolkit is thinning and the military options that once looked overwhelming are becoming progressively harder to sustain.
The numbers explain why. The counter uses the Pentagon’s own briefing to Congress: $11.3 billion for the first six days, plus $1 billion per day ongoing. By April 4, direct military spending had reached approximately $35–38 billion. Harvard Kennedy School public policy professor Linda Bilmes has gone further: “I am certain we will reach $1 trillion for the Iran war,” she said, with her research identifying several reasons why this military operation could have catastrophic consequences for the US national debt well into the future — estimating short-term upfront costs at around $2 billion per day during the 40 days of live conflict. This is, by any measure, the most expensive per-day conflict in modern US history.
The Blockade’s Serious Limits
After ceasefire talks with Iran failed to produce a deal, Trump announced the US Navy would immediately impose a blockade on the Strait of Hormuz — turning the tables on Iran, which had effectively kept the narrow waterway closed with missile and drone strikes, keeping one-fifth of the world’s oil and liquefied natural gas bottled up in the Persian Gulf. The concept is straightforward. The execution is anything but.
US warships near the strait could be vulnerable, as Navy officials have previously described it as an Iranian “kill box” filled with numerous threats, including anti-ship missiles, drones, fast-attack boats, and mines. Retired Admiral James Stavridis, who served as NATO’s supreme allied commander, characterized the blockade as falling halfway between leaving the strait under Iranian control and Trump’s earlier threat to wipe out Iran as a civilization, adding: “It puts economic pressure on Tehran without destroying the oil facilities, which you should want to preserve into the future.” That framing is reasonable. What it doesn’t acknowledge is that Iran has multiple asymmetric responses available — and the IRGC Navy has already signaled its intent to use them. The IRGC Navy said that any military vessel approaching the strait would be considered a ceasefire violation and would meet a “severe response.”
The blockade also faces a political coherence problem. CENTCOM clarified that the blockade will only be enforced on ships travelling to or from Iranian ports — meaning it is not a full closure of the strait but a targeted embargo on Iranian commercial traffic. That distinction matters: it may be legally cleaner, but it is also far less economically devastating to Tehran than a full blockade. Iran has already been collecting transit tolls and exporting oil while keeping others out. A partial blockade that allows global traffic while restricting Iranian vessels does not remove that leverage.
The Munitions Trap
Beneath the blockade announcement lies the constraint that is shaping every US decision: the state of the munitions stockpile. Lawmakers have expressed concern that the war has depleted “years’ worth” of US weapons stockpiles. Some reports suggest the US used close to 2,000 munitions in the first days of the war — amounting to roughly 10% of cruise missiles and a quarter of all THAAD interceptor weapons in those early days. The Army anticipates delivery of only 172 Patriot missiles this fiscal year — a figure dwarfed by what has already been expended.
The DoD does not appear to have an inventory problem in sustaining the current conflict because munitions use to date will not drive any inventories to zero — but these expenditures create risks in other theaters such as Ukraine and the western Pacific, as high-demand munitions are diverted to the current war with Iran. Production in FY 2026 will not fully cover usage to date and will limit the hoped expansion of inventories. That is a careful way of saying what military planners know more bluntly: Washington is burning through strategic reserves that take years to replace, in a theater that was never supposed to be the primary focus.
The base damage compounds the problem. The damage to US bases in the region has been underreported, according to CSIS adviser Mark Cancian, with many of the US military bases near Iran rendered “all but uninhabitable” due to Iran’s strikes — causing $800 million in damage to bases in the first two weeks alone, including Al-Ruwais in the UAE, the naval base in Bahrain, Ali Al-Salem in Kuwait, and Al-Udeid in Qatar. The USS Gerald R. Ford, the largest carrier in the theater, was damaged by a fire on March 12 and subsequently paused airstrikes to sail toward Crete for repairs.
Iran Is Adapting, Not Collapsing
The strategic logic behind Trump’s threat to resume strikes “bigger, and better, and stronger than anyone has ever seen before” rests on an assumption that has already failed once: that sustained punishment will produce Iranian capitulation. It will not. Iranian state media threatened that Iran could seize Bahraini and Emirati territory if the US “makes any mistakes,” while signaling its readiness to open a new front in Yemen by closing the Bab al-Mandab with the Houthis. A second front at the Bab al-Mandab would replicate the Hormuz crisis at a different chokepoint — one equally vital to European energy supply and global shipping.
Iran’s reconstitution capability is also not trivial. The IRGC’s decentralized command structure means that killing senior leaders does not paralyze the system. Iran’s drone program, built in dispersed civilian facilities deliberately designed to survive decapitation strikes, can resume production faster than Washington’s interceptor factories can replace what they’ve fired. Iran is letting its own oil exports through the strait, capitalizing on the massive spike in crude prices — while a US blockade of Hormuz would cut off that financial windfall and further hobble an economy already crashing before the war started. That may be the blockade’s one genuine strategic advantage. But it also carries the risk of triggering the very escalation Washington says it wants to avoid.
The Midterms Are Looming
The political calendar is now a military constraint. With November midterms approaching and gas prices still elevated, the Congressional Budget Office trajectory — already projecting debt rising to 175% of GDP by the mid-2050s — has been pushed further into the red by $35–45 billion in unbudgeted military spending. The Pentagon is already requesting a $200 billion supplemental from Congress, while Trump has signaled he wants Arab allies to help foot the bill.
The domestic political arithmetic is unforgiving. More than half of Americans oppose the war. Gas prices that surged 39% at their peak are the most visible domestic consequence of a conflict that was launched without congressional authorization and has produced none of its stated objectives. Iran retains its nuclear stockpile, its missile program, its proxy networks, and — most consequentially — its ability to determine who transits the world’s most important energy chokepoint. The blockade may squeeze Tehran economically. It will also squeeze Washington politically — and Iran has demonstrated, across six weeks of conflict, that it is considerably more patient than the American electoral cycle.
Original analysis inspired by Dana L. Stroul from Los Angeles Times. Additional research and verification conducted through multiple sources.
