U.S. Navy Secretary John Phelan has been forced out of President Donald Trump’s administration after just 13 months in the job, the latest high‑profile departure from the Pentagon as the Navy leads a risky maritime blockade of Iran around the Strait of Hormuz. Pentagon spokesperson Sean Parnell said Phelan was “leaving the administration, effective immediately,” and named Navy Undersecretary Hung Cao as acting secretary, but officials privately acknowledged that Defense Secretary Pete Hegseth told Phelan to resign or be fired after months of clashes over shipbuilding and wartime decision‑making.
A sudden exit at a sensitive moment
The Pentagon announced Phelan’s departure in a brief statement Wednesday, saying only that he was “leaving the administration, effective immediately.” Parnell thanked him “for his service to the Department and the United States Navy” on behalf of Hegseth and Deputy Defense Secretary Steve Feinberg and wished him well.
Behind the terse language, officials describe a forced resignation. CNN and the New York Times report that Hegseth summoned Phelan and told him he could step down or be fired, after months of friction over how fast to overhaul the Navy’s shipbuilding and how to run the high‑risk blockade of Iran. A senior White House official told CNN that Trump was informed of the decision and did not intervene.
Phelan’s exit comes as the U.S. Navy enforces a maritime blockade of Iranian ports and shipping in and around the Strait of Hormuz, a mission that has put American warships on constant high alert and drawn accusations of “piracy” from Tehran. It also follows Hegseth’s recent ouster of the Army’s top general, underscoring a period of rapid turnover in the upper ranks of Trump’s defense team.
Feud over shipbuilding, and over Trump
U.S. officials say the break between Phelan and Hegseth centred on Navy shipbuilding reforms and Phelan’s habit of going directly to Trump with ideas, bypassing the chain of command.
CNN reports that Hegseth thought Phelan was moving “too slowly” to reshape the fleet and eliminate what the secretary saw as legacy programs that did not fit Trump’s wartime vision. The Wall Street Journal says the defense chief was also angered by Phelan’s frequent private communications with the president, including late‑night text messages about warship construction from Florida, where Phelan owns a home near Trump’s Mar‑a‑Lago resort.
Last year, Phelan reportedly pitched a plan for a new class of “Trump‑class” or “Golden Fleet” warships directly to the president, without consulting Hegseth, a move that particularly rankled the defense secretary, according to the Journal and the New York Post. In response, Hegseth and Feinberg created a new position in the Office of the Secretary of Defense to oversee submarine acquisitions and major naval programs, effectively stripping Phelan of some of his traditional portfolio.
Multiple outlets describe a deteriorating relationship in which Phelan increasingly viewed the Pentagon’s civilian leadership as micromanaging the Navy, while Hegseth came to see Phelan as an unreliable team player unwilling to execute his agenda.
A billionaire donor with no military background
Phelan’s appointment was controversial from the start. A billionaire investor and longtime Republican donor, he had no prior military service and was best known in Washington for raising millions of dollars for Trump’s 2024 campaign before being nominated as Navy secretary in 2025.
The New York Times notes that he is the first civilian leader of the Navy in decades with no prior military or Pentagon experience, a stark contrast with some predecessors who had served as officers or had long careers in defense policy. Critics warned at the time that his close personal relationship with Trump could blur lines between political loyalty, procurement priorities and sound strategic planning.
Once in office, Phelan embraced Trump’s rhetoric about rebuilding a “dominant American fleet,” backing proposals for larger, more heavily armed surface combatants and fast‑tracked amphibious and expeditionary capabilities. But he also walked a tightrope between White House demands and congressional skepticism over cost, industrial capacity, and the Navy’s repeated struggles to deliver ships on time and on budget.
Lawmakers on both sides of the aisle have criticized aspects of the Navy’s shipbuilding plan, and Phelan’s short tenure left many of those disputes unresolved.
Iran war and the Strait of Hormuz
Phelan’s removal lands amid the eighth week of the U.S.–Iran war, in which the Navy has played a central role enforcing a naval blockade around Iran and the Strait of Hormuz, the chokepoint through which roughly a fifth of the world’s seaborne oil usually flows.
Al Jazeera and other outlets note that his exit follows several high‑stakes incidents:
- U.S. forces detained an Iran‑linked tanker, the Tifani, near Hormuz, prompting Tehran to denounce the move as “piracy” even as fragile ceasefire talks continue.
- The blockade has contributed to a near‑halt in commercial shipping through the strait, with hundreds of vessels and thousands of seafarers stranded or rerouted.
- The Navy is operating at a high tempo in the Gulf and Arabian Sea, intercepting cargo, escorting allied shipping, and responding to Iranian harassment and attacks.
While Phelan was not a field commander, he was part of the civilian leadership shaping naval posture and long‑term force structure at a moment when sea power is central to U.S. strategy. His departure adds uncertainty at the top just as the service manages a complex mix of warfighting, deterrence, and diplomacy at sea.
Hung Cao steps in as acting secretary
With Phelan gone, Navy Undersecretary Hung Cao, 54, will serve as acting secretary of the Navy, the Pentagon said.
Cao, a retired Navy captain and former special operations officer, had served as the department’s second‑ranking civilian official since 2025 and is viewed within the service as a more traditional choice, blending operational military experience with civilian management.
Pentagon spokesman Parnell said Cao would “ensure continuity of leadership” while Trump and Hegseth consider a permanent replacement. It is not yet clear whether the administration will nominate Cao for the role formally or look for another candidate, possibly another political ally from outside the military, or a retired flag officer acceptable to both the White House and the Senate.
For now, Cao inherits a Navy grappling with war‑time deployments, mounting maintenance backlogs and the long‑term demands of shipbuilding, all under intense political scrutiny.
Another sign of Pentagon churn
Phelan’s ouster continues a pattern of rapid turnover at the top of Trump’s national‑security apparatus.
In recent weeks, Hegseth has:
- Pushed out the Army’s chief of staff, citing disagreements over readiness and recruitment, at the same time the service raised its maximum enlistment age to 42.
- Clashed with other senior officers over strategy in Iran and over the balance between conventional and AI‑enabled capabilities in future forces.
The Associated Press notes that Phelan is the first head of a military service to depart the administration since the Iran war began, and that the Pentagon gave no official rationale beyond his desire to leave. Analysts say the string of departures raises questions about civil‑military relations and whether senior officials feel empowered, or constrained, in offering candid advice in wartime.
What Phelan’s exit means for the Navy
Substantively, Phelan’s departure is unlikely to change the immediate course of operations in the Gulf, which are run by combatant commanders under standing orders from the president and defense secretary. The blockade of Iran, the deployment of carrier strike groups and the force‑protection posture in and around Hormuz will continue under existing plans.
But over the medium term, the change could matter in at least three ways:
- Shipbuilding priorities: Hegseth and Feinberg have already moved to centralize some acquisition decisions in the Office of the Secretary of Defense. Without Phelan’s competing vision, they may have more freedom to reshape the Navy’s long‑term fleet plan.
- Civilian‑military balance: Installing an acting secretary with operational experience in Cao may reassure some in uniform who were uneasy with Phelan’s outsider status, but it also underscores that the service’s top civilian post can turn over quickly in a politicized environment.
- War‑time messaging: Phelan was an ardent public supporter of Trump’s maritime strategy. His exit removes a key political ally from the Pentagon podium and may change how the Navy talks about risk, readiness and the strain on sailors and ships.
Phelan himself has yet to give a detailed public account of his departure. As of Wednesday night, he had not posted any statement on social media or responded to press inquiries, leaving others to define the narrative of a tenure that began with big promises, collided with Pentagon realities, and ended with a blunt ultimatum from his boss.
For the Navy, the Iran war and the Hormuz blockade roll on, with a new acting secretary at the helm, and with the knowledge that in this administration, the politics of shipbuilding and war‑time leadership can be as turbulent as the seas its sailors are ordered to patrol.
