Hegseth urges second Pentagon probe of Sen. Mark Kelly over briefing comments

Pete Hegseth has pushed for a second Pentagon investigation of Sen. Mark Kelly, turning a policy dispute over U.S. weapons inventories into a sharper clash over civil-military boundaries and the reach of defense authority over a sitting senator.

Kelly, an Arizona Democrat and former Navy captain, said on CBS News’ Face the Nation on May 10 that Pentagon briefings covered Tomahawks, ATACMS, SM-3, THAAD rounds and Patriot rounds. He said it was “shocking” how deeply the United States had gone into its magazines, and said replenishing some of those munitions would take “years.” Kelly also warned that if a conflict with China lasted months or years, the United States would be in a worse posture because of the depletion.

Hegseth reacted by suggesting Kelly may have violated his oath, and by calling for the senator to be investigated again by the Pentagon. CNN reported that Hegseth described Kelly as “blabbing on TV” about a classified briefing. Kelly pushed back by saying the matter was not classified, pointing to Hegseth’s own public comments a week earlier that it would take years to replenish some stockpiles.

The dispute lands in the middle of a broader debate over how much U.S. military capacity has been strained by the war in the Middle East and what that means for a future fight in the western Pacific. Kelly also cited the conflict’s cost at at least $50 billion during the CBS interview. CNN has reported that the war significantly depleted key U.S. missile stockpiles and created a near-term risk of shortages in a future conflict if one arose in the next few years.

This is not the first time the Pentagon has targeted Kelly. Its first investigation began on Nov. 24, 2025, after Kelly joined five other Democratic lawmakers with military or intelligence backgrounds in a video urging troops to refuse illegal orders. The Pentagon said then that Kelly could be recalled to active duty for court-martial or administrative action. Donald Trump accused the lawmakers of sedition “punishable by DEATH.”

Kelly sued Hegseth in January 2026. On Feb. 12, a federal judge granted him a preliminary injunction and said Hegseth had violated the Constitution in trying to punish him. After oral arguments in Kelly v. Hegseth at the U.S. Court of Appeals for the D.C. Circuit on May 7, Kelly said, “This President is trying to silence us.”

The case has already spilled beyond a military dispute and into Congress, where H.Res. 932 condemned Kelly and the other lawmakers for what it called “dangerous and seditious rhetoric.” With a second Pentagon probe now underway, the question is whether defense officials are policing disclosure or using investigative power to discipline dissent on national-security issues.