Defense Secretary Pete Hegseth fired Navy Secretary John Phelan on Wednesday, 13 months into his tenure and one day after Phelan addressed sailors and industry representatives at the Navy's annual conference in Washington. Pentagon spokesman Sean Parnell said Phelan was "departing the administration, effective immediately." Navy Undersecretary Hung Cao, a 25-year Navy veteran, will serve as acting secretary.

The dismissal removes the civilian head of a service enforcing President Trump's blockade of Iranian ports while a fragile ceasefire with Tehran frays. Phelan oversaw Navy budgets, personnel and shipbuilding, the areas where his relationships with Hegseth and Deputy Defense Secretary Steve Feinberg had reportedly soured. His exit is the latest in a string of senior Pentagon dismissals since Hegseth took over.

One day earlier

On Tuesday, Phelan worked a ballroom of sailors and defense contractors in Washington, discussing his agenda and taking questions from reporters, according to PBS NewsHour. By Wednesday afternoon, the Pentagon's social-media accounts carried the notice of his exit. Neither Parnell's statement nor Hegseth's office offered a reason for the timing.

The backdrop

Phelan, 62, came to the Pentagon in 2024 with no prior defense experience. A former businessman and investment executive, he was a major Republican donor and fundraiser before his appointment. Al Jazeera reported that criticism of his pace on shipbuilding reform and strained relationships with senior Pentagon leaders dogged his tenure, and that he was under an ethics investigation whose details have not been made public.

NPR's Greg Myre characterized the rift as a mix of personal conflicts and disagreements over shipbuilding strategy, and said Hegseth retains Trump's backing despite the run of dismissals. Army Chief of Staff General Randy A. George was fired in early April. Al Jazeera reported that the head of Army Transformation and Training Command and the Army's chief of chaplains were also dismissed, though the Pentagon has not confirmed those removals.

What the Navy is doing now

The Navy is carrying out the administration's blockade of Iranian ports, intended to restrict oil exports and pressure Tehran into a nuclear deal. Talks have stalled. Iran has not recognized Trump's unilaterally extended ceasefire and this week attacked three commercial ships and seized two others in the Strait of Hormuz, NPR reported. Al Jazeera reported the service is continuing to deploy additional naval assets to the region.

Cao, the acting secretary, spent 25 years in the Navy before moving into the civilian side of the department. His elevation keeps a political appointee atop the service but places day-to-day authority in the hands of a career officer at a moment when the Navy is the instrument of U.S. policy in the Gulf.

Counterpoint

Administration officials beyond Parnell's terse statement had not publicly detailed a cause for the firing by press time, and no Republican or right-leaning outlet in the day's reporting offered an on-the-record defense of the decision. The framing of Hegseth's tenure as defined by dismissals comes from Al Jazeera and NPR, both lean-left outlets; PBS NewsHour, which anchors today's center framing, described the move in neutral terms as another significant leadership change at the Department of Defense. The ethics-investigation reporting is sourced to Al Jazeera citing unnamed reports and has not been confirmed by the Pentagon.

The Senate will eventually need to confirm a permanent successor. No nominee has been named. Cao holds the job in the meantime, with the Navy's annual conference continuing in Washington and the blockade of Iranian ports still in force.