
Pentagon senior advisor Dan Caldwell has been removed from his post and placed on administrative leave as an investigation unfolds into his alleged unauthorized disclosure of sensitive information.
Quick Takes
- Dan Caldwell, a key advisor to Defense Secretary Pete Hegseth, was placed on administrative leave and escorted from the Pentagon amid a leak investigation.
- A memo from Hegseth’s chief of staff mentioned potential use of polygraphs in the investigation of national security information leaks.
- Caldwell, a Marine Corps and Iraq War veteran, was involved in Signal chats discussing Yemen strikes that were later leaked to The Atlantic.
- The Pentagon has not revealed specific details about what information was leaked or who received it.
- Caldwell has previously expressed controversial views about U.S. military policy, including criticism of the Iraq War as a “monstrous crime.”
Pentagon Investigates Unauthorized Disclosures
A senior advisor to Secretary of Defense Pete Hegseth has been removed from the Pentagon following an investigation into unauthorized leaks of sensitive information. Dan Caldwell, who served as a key member of Hegseth’s advisory team, was placed on administrative leave as the Department of Defense investigates his alleged involvement in disclosing classified materials. The investigation comes amid heightened security concerns within the Pentagon about the handling of sensitive information related to national security matters. Although specific details about the leaked information remain undisclosed, officials confirm the matter is being treated with utmost seriousness.
The investigation appears to focus on communications involving military operations against Houthi rebels in Yemen. Caldwell was reportedly part of a Signal chat group discussing potential strikes, conversations that were subsequently leaked to media outlets. According to Reuters reporting based on an insider source, investigators identified Caldwell as playing a central role in the unauthorized disclosures. The incident has raised significant concerns about information security protocols within the department during the early months of the new administration.
One of U.S. Defense Secretary Pete Hegseth's leading advisers, Dan Caldwell, was escorted from the Pentagon on Tuesday after being identified during an investigation into leaks at the Department of Defense, a U.S. official told Reuters. https://t.co/YmBDnTZLNE pic.twitter.com/wYbl5ni3EX
— Reuters (@Reuters) April 16, 2025
Controversial Background Emerges
As the investigation unfolds, Caldwell’s background and previous statements have come under scrutiny. A Marine Corps veteran who served in Iraq, Caldwell had previously worked with Concerned Veterans for America, an organization with strong ties to Republican lawmakers. However, his views on American military policy have at times diverged from traditional conservative positions. Caldwell has advocated for a more restrained approach to American military power globally, questioning long-standing policies of American military primacy that have guided defense strategy for decades.
“I think the United States should strive to remain the most powerful country in the world. But in my mind, that is different from trying to achieve primacy. In my view, attempting to be the dominant power is different from trying to be the most powerful country.” – Source
Caldwell’s past comments about U.S. military interventions have raised eyebrows, particularly his harsh assessment of America’s involvement in Iraq. Despite being an Iraq War veteran himself, Caldwell characterized the conflict in stark terms that contrast with the views of many Republicans and military leaders. He has also reportedly expressed disagreement with aspects of U.S. military assistance to Israel, positions that have complicated his role advising on current Middle East policy matters within the Pentagon leadership.
Pentagon Takes Strong Stance Against Leaks
A memo from Joe Kasper, chief of staff to Secretary Hegseth, highlights the serious approach being taken toward unauthorized disclosures. The document reportedly calls for robust investigation methods, including the potential use of polygraph examinations to identify those responsible for leaking sensitive information. The Pentagon appears determined to address what it sees as a significant breach of protocol and potential threat to national security operations, demonstrating the administration’s commitment to information security.
“I expect to be informed immediately if this effort results in information identifying a party responsible for an unauthorized disclosure, and that such information will be referred to the appropriate criminal law enforcement entity for criminal prosecution” – Source
Officials have clarified that the investigation into Caldwell remains ongoing, with no final determinations yet made about potential criminal referrals. The administrative leave represents a procedural step allowing the investigation to proceed unimpeded. Department representatives have emphasized that Caldwell’s removal is specifically related to the leak investigation and separate from other recent changes in federal personnel under the administration. The case highlights the challenges of maintaining information security within the nation’s defense apparatus during a time of global instability.
Sources:
- Hegseth adviser placed on leave after investigation into Pentagon leaks
- Hegseth Advisor Who Was Included in Leaked Signal Text Chain Escorted From Pentagon, Placed on Leave