On February 28, 2026, US-Israel strikes on Iran killed supreme leader Ali Khamenei. By March 2, the IRGC had officially closed the Strait of Hormuz, a chokepoint carrying 20% of the world's daily oil supply. Iran refined this into a "smart closure," blockading only US, Israeli, and Western-allied ships while allowing Turkish, Indian, and Saudi vessels through. But tanker traffic collapsed to near-zero anyway. Fifteen million barrels of crude and five million barrels of refined products now sit stranded in the Gulf each day.
1. We Planned For This (Pete Hegseth, Karoline Leavitt)
The administration says they anticipated Iran's move all along.
Defense Secretary Pete Hegseth calls the idea that officials underestimated the crisis "patently ridiculous." "For decades, Iran has threatened shipping in the Strait of Hormuz," Hegseth told reporters. "We have been dealing with it, and don't need to worry about it." The military had contingencies, he says. "We planned for it. We recognize it."
White House press secretary Karoline Leavitt says Trump was "fully briefed" on the issue. Multiple current and former officials told CNN that any military action against Iran would naturally account for Strait disruption, and that the US military has "long maintained and updated plans" to address Iranian military action in the corridor.
2. Sure, He Was Warned -- He Just Didn't Listen (Gen. Dan Caine, CNN Pentagon Sources)
Trump's own top general told him this would happen. He dismissed it.
The warnings were multiple and furious. Gen. Dan Caine, the Chairman of the Joint Chiefs, warned Trump in multiple pre-war briefings that Iran would likely close the Strait of Hormuz if attacked. Trump acknowledged the risk but told advisers he believed Tehran would capitulate before taking that step — and that the US military could handle it if necessary. They significantly underestimated Iran's willingness to actually follow through, in part because Iran made "empty threats" after the US strikes in summer 2025.
But he didn't quite get it — blame his acolytes. Trump always prefers a tight inner circle. That might have sidelined the debate. Interagency discussion of economic fallout got squeezed out. Fox News, which Trump relies on heavily, produced almost no coverage of Strait risks in the month before the attack. The result: Trump's national security team failed to fully account for what officials now describe as a worst-case scenario.
3. Any Surprise Is Idiotic -- This Was Always Iran's Trump Card (Helima Croft, Matthew Kroenig, Atlantic Council)
The Strait closure isn't a surprise to anyone who understood Iran's geography.
Iran didn't all of a sudden discover the Strait's economic power — it weaponized it as leverage for decades. Helima Croft, RBC Capital Markets' global head of commodity strategy and former US intelligence analyst, calls this "the biggest energy crisis since the oil embargo in the 1970s." She notes bluntly: "We have never had the most important waterway for energy effectively closed."
Iran's method was elegant and cheap. Iran has made tactical drone strikes near the waterway. That was enough to spook insurers and shipping companies. The Atlantic Council describes what Iran built as an "economic booby trap." They're not planning on beating the United States Navy; they're making the cost of confrontation greater than the cost of concession. And escorts won't fix it; shippers are too scared. Trump called for an international naval coalition to reopen the strait on March 14, but no country has publicly agreed.
Where This Lands
The core dispute isn't whether Iran's closure was possible; it always was. The question is why Trump believed Iran wouldn't do it when his own top general said otherwise — and when geopolitical analysis has always known this to be a major issue. The administration's defense — that they "planned for it" — sits uneasily alongside reports that the NSC didn't fully account for the consequences of exactly this scenario. On the other hand, Iran has repeatedly threatened to close the Strait since 2018 but has never followed through, which is a reasonable basis for skepticism. Where this lands depends on whether Trump dismissed a clear warning out of overconfidence, or whether Iran's history of bluffing created a trap that any president might have fallen into. Either way, Iran is now using this point of leverage — and the world is paying the price.
NPR, "The Iran war has effectively closed the Strait of Hormuz"
Wall Street Journal (via Times of Israel), "Top US general warned Trump before war that Iran could close Strait of Hormuz"
CNN Politics, "Trump administration underestimated Iran war's impact on Strait of Hormuz"
https://www.cnn.com/2026/03/12/politics/hormuz-trump-administration-underestimated-iran
Wall Street Journal (via Tehran Times), "Though Trump knew Iran may close Hormuz Strait, he ordered war"
Wall Street Journal (via Political Wire), "Trump dismissed risk of Iran blocking Strait of Hormuz"
https://politicalwire.com/2026/03/13/trump-dismissed-risk-of-iran-blocking-strait-of-hormuz/
Al Jazeera, "Iran says will attack any ship trying to pass through Strait of Hormuz"
Atlantic Council, "By threatening the Strait of Hormuz, Iran turns geography into a global economic weapon"
CNBC, "Defense Secretary Pete Hegseth on Strait of Hormuz: 'Don't need to worry about it'"
https://www.cnbc.com/2026/03/13/iran-war-strait-of-hormuz-hegseth.html
CNBC, "Iran's military is weakened, still poses a risk to the Strait of Hormuz: CSIS"
Congressional Research Service, "Iran Conflict and the Strait of Hormuz"
https://www.congress.gov/crs-product/R45281
Al Jazeera, "Trump calls for naval coalition to open Strait of Hormuz: Can it work?"
Media Matters, "Dire Strait: Trump's Fox Cabinet ignored Hormuz"