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Ex-Joint Chiefs Head Adm Mike Mullen warns polarization hits US military

In United States News by Newsroom December 12, 2025

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Credit: Astrid Riecken/Getty

  • US ideological polarization sharpens in armed forces.
  • Affects wider, junior military cross-section deeply.
  • Challenges military's apolitical stance severely.

The political climate facing currently serving officers is "challenging" and "the most dangerous time" in his memory, according to retired Adm. Mike Mullen, who served as the US military's top commander under Presidents George W. Bush and Barack Obama.

Speaking on Wednesday at a security summit hosted by the Aspen Institute think tank, he cautioned that, compared to his time as joint chiefs head from 2007 to 2011, it was now far more difficult to uphold the military's traditional apolitical posture.

“I didn’t really understand how hard [the civilian-military relationship] was until I was in the middle of it,”

he said.

“I talked about the military being apolitical a lot in those four year and it’s only gotten harder. We have gotten so much more divided.”

Mullen's remarks come after claims that the Trump administration has deliberately attempted to politicize the armed forces by firing senior commanders and sending national guard units on unusual law enforcement operations in American cities, such as Washington, DC, to combat alleged "crime waves."

“In recent history, the political world has been the purview of the chairman [and] the vice-chairman … very few individuals [in the military], honestly, including myself, are ready for that, because we haven’t grown up in it,”

Mullen said.

“The challenge now is that pool has gotten a lot deeper and a lot wider, and it involves a much larger number of the military leadership than it used to – down to, in some cases, one or two stars. It’s a much more difficult world politically than it was back then.”

He questioned the rationale behind the dismissal of a number of senior commanders, including Adm Lisa Franchetti, the first female chief of the navy, and Gen. CQ Brown, his successor as chairman of the joint chiefs. He claimed that the dismissed officers would have faithfully served under Donald Trump.

“There’s a view from the administration that these are individuals that they did not want serving for them,”

he said.

“There is some mystery behind why some of this happened, and there are surmised reasons but the [suggested] opposition to the president just that just is not true.
On the 20th of January … we pivot to whoever the new president is and the new administration, and that’s who we follow. Those are the policies that we execute, whether we personally like them or not.”

According to him, junior ranks were unsettled by the abrupt changes in senior personnel, leaving "the troops hanging."

Additionally, Mullen denounced a recent film produced by six Democratic congressmen who had served in the armed forces, which urged active duty members to defy "illegal orders." Since then, the six have stated that the FBI is looking into them.

“There isn’t anybody serving at the high level [or] way beyond that doesn’t know you don’t have to follow an unlawful order,”

Mullen said.

“We just don’t need that from either side, quite frankly, because we need to be an apolitical outfit.”

During his first term as president, Mullen, who was known for being vocal while serving as chair of the joint chiefs, chastised Trump for employing the military to drive Black Lives Matter demonstrators out of Lafayette Square, which is close to the White House, in order to make room for a visit to St. John's Church.

“It sickened me,

he wrote in the Atlantic in an article headlined “I cannot remain silent” and warned of the dangers of the military “being co-opted for political purposes”.

“I remain confident in the professionalism of our men and women in uniform,”

he wrote.

“They will serve with skill and with compassion. They will obey lawful orders. But I am less confident in the soundness of the orders they will be given by this commander in chief.”

What steps have senior leaders taken to prevent politicization?

Elderly US service leaders, including former Joint Chiefs Chairman Gen. Mark Milley, have issued repeated directives emphasizing the fortified forces' apolitical tradition to fight rising polarization among troops. 

Commands have boosted enforcement of DoD Instruction 1344.10, proscribing prejudiced political conditioning in livery, similar as wearing crusade gear or posting divisive social media from sanctioned accounts, with commanders needed to conduct periodic training on impartiality. 

Joint Chiefs and service registers promote" professional service morality" briefings at all situations, from rookies to generals, while covering unit cohesion through anonymous checks; high- profile reprimands of prejudiced incidents, like Fort Bragg events, emphasize zero forbearance for division.