Defense Secretary Pete Hegseth terminated Secretary of the Navy John C. Phelan on Wednesday afternoon, April 22, cutting short his tenure during one of the most consequential periods in recent American naval history. The dismissal, effective immediately, places Hung Cao, previously Navy Undersecretary, into the acting role. This leadership change occurs as the United States is engaged in an active military and economic confrontation with Iran, with the U.S. Navy operating aggressively in and around the Strait of Hormuz.
"The administration really wanted to accelerate the shipbuilding program because of the president’s agenda … and the secretary seemed incapable of accomplishing those goals and he wasn’t well liked." — Source, The New York Post
Sources familiar with the matter indicate that tensions had been building between Phelan and the administration, particularly concerning President Donald Trump’s sweeping naval expansion initiative, known as the “Golden Fleet.” This program calls for the construction of a brand-new class of nuclear-capable warships, to be designated “Trump-class” battleships, each displacing between 30,000 and 40,000 tons, according to analysis from the Center for Strategic and International Studies. Phelan was reportedly perceived as not moving quickly enough to accelerate this ambitious shipbuilding program.
A source, speaking to The New York Post, stated, "The administration really wanted to accelerate the shipbuilding program because of the president’s agenda … and the secretary seemed incapable of accomplishing those goals and he wasn’t well liked." The source further commented on Phelan’s standing within the Pentagon, adding, "When you combine incompetence with arrogance it usually doesn’t end well." Separately, The Wall Street Journal reported that Phelan had been feuding with both Defense Secretary Hegseth and Deputy Defense Secretary Steve Feinberg in the weeks leading up to his removal.
The Pentagon confirmed the dismissal through a formal statement issued by Hegseth’s office. The statement read: “Secretary of the Navy John C. Phelan is departing the administration, effective immediately. On behalf of the Secretary of War and Deputy Secretary of War, we are grateful to Secretary Phelan for his service to the Department and the United States Navy. We wish him well in his future endeavors. Undersecretary Hung Cao will become Acting Secretary of the Navy.”
Phelan’s exit does not occur in isolation but rather at the tail end of a broader series of high-level departures and reassignments that have reshaped the upper ranks of the American military under Secretary Hegseth’s leadership. Since assuming his post, Hegseth has removed more than a dozen senior officers. Notable among these are Chairman of the Joint Chiefs of Staff General C.Q. Brown, Chief of Naval Operations Admiral Lisa Franchetti, Air Force Vice Chief of Staff General James Slife, and Defense Intelligence Agency Director Lieutenant General Jeffrey Kruse. Just weeks prior to Phelan’s termination, Army Chief of Staff General Randy George, a four-star general responsible for organizing, training, and equipping a force exceeding one million soldiers, was directed to stand down and retire immediately, with his removal taking effect on April 2.
These internal leadership shifts coincide with a period of heightened geopolitical tension, particularly in the Persian Gulf region. The Navy is currently operating in one of the most volatile maritime environments in decades. The United States initiated a full naval blockade of Iranian ports and coastal waters, spanning the Gulf of Oman and the Arabian Sea, on April 17. This blockade has effectively cut off vessel traffic to and from Iran’s shoreline.
The blockade followed the collapse of diplomatic negotiations on April 12, when Vice President JD Vance returned from Islamabad without securing an agreement with Iranian counterparts. Just two days before Secretary Phelan’s termination, the U.S. Navy intercepted and seized an Iranian cargo vessel attempting to pass through the American blockade inside the Strait of Hormuz. In response, Iran vowed to choke off commercial shipping through the strait for as long as American forces continue blocking its ports.
The Strait of Hormuz, a narrow passage that historically saw more than 3,000 ships transit monthly, serves as a critical artery connecting global trade routes. Since the escalation, transits have reportedly been reduced to only a handful per day. For Tehran, the strait functions as its most formidable economic weapon; its closure could significantly rattle global markets and exert considerable political pressure on Washington. Conversely, for the Trump administration, the naval blockade serves as a financial vice, aimed at denying Iran the oil revenue it depends on to sustain its government and nuclear program. The roots of this escalating conflict trace back to February 28, when the States and Israel launched coordinated military operations targeting Iran’s nuclear program.
The combination of significant leadership changes within the U.S. military and active confrontation in a critical global chokepoint underscores the strategic complexities facing the Trump administration. The appointment of Acting Secretary Cao comes at a juncture demanding both internal cohesion and decisive external action from the U.S. Navy.
