Pentagon Opens Investigation Into Sen. Mark Kelly Over Video Urging Troops to Refuse “Illegal Orders”

The Pentagon has launched a formal investigation into Sen. Mark Kelly, the Arizona Democrat and former Navy captain, after he appeared in a video telling U.S. service members they must refuse “illegal orders,” a move that has escalated already tense civil–military relations in Washington.

In a statement posted on social media, the Department of Defense said it had “received serious allegations of misconduct” and was reviewing whether Kelly’s comments violated the Uniform Code of Military Justice, noting that federal law allows retired officers to be recalled to active duty for possible court-martial. Kelly, who flew combat missions in the Gulf War and later became a NASA astronaut, retired from the Navy with the rank of captain in 2011.

The video, released this month, features Kelly and several other Democratic lawmakers with military or national security backgrounds. In it, they stress that troops swear an oath to the Constitution, not to any individual leader, and are obligated to disobey unlawful commands. Though the video does not name specific directives, it was posted amid controversy over President Donald Trump’s reported orders authorizing lethal strikes on suspected Latin American drug traffickers and other aggressive military operations.

Defense Secretary Pete Hegseth has sharply condemned the group, reportedly referring to them as the “Seditious Six” and suggesting Kelly could be recalled to active duty for prosecution. Trump has amplified the criticism on social media, accusing the lawmakers of sedition.

Kelly has forcefully pushed back, calling the review an attempt to silence critics of the administration’s national security policies. In a statement and subsequent media appearances, he has argued that reminding troops of their duty to reject illegal orders is fully consistent with both U.S. law and his oath of office. “I’ve given too much to this country to be silenced by bullies,” he said in comments reported by ABC News.

Legal scholars are divided on how far the Pentagon could realistically go. Experts interviewed by Reuters and other outlets say the department has the technical authority to recall Kelly, but any attempt to court-martial a sitting senator for political speech would raise profound constitutional questions about free expression and separation of powers. They also point to potential problems with “unlawful command influence” if senior officials have already publicly denounced him.

The investigation marks an extraordinary confrontation between the military establishment and a member of Congress with deep roots in the armed forces. Kelly served as a Navy pilot, flew 39 combat missions in Operation Desert Storm, and later spent more than 50 days in space on four Space Shuttle missions before retiring from NASA. He was elected to the Senate in 2020 and is now viewed as a prominent Democratic voice on defense, space, and technology issues.

In recent weeks, Kelly has also been in the spotlight for bipartisan legislative work, including the proposed SMART Infrastructure Act to modernize how the U.S. plans transportation projects using advanced digital modeling, and an AI Security Readiness Act to bolster guidance from the National Security Agency on protecting critical systems from AI-enabled threats.

The Pentagon has not given a timeline for when its review of Kelly will conclude. For now, the probe adds a new layer of uncertainty to the political future of a senator already mentioned as a potential 2028 presidential contender, even as he insists that speaking out about the limits of lawful military orders is part of his job, not a crime.