In one case, he told aides on the encrypted app to inform foreign governments about an unfolding military operation, people familiar with his management practices said.

Defense Secretary Pete Hegseth ordered a major restructuring Monday of the way the military is led, including a plan to cut hundreds of positions from its highest ranks. Hegseth, in a memo and video laying out his moves,

Hegseth and other members of the national security team have drawn scrutiny over their use of Signal to hold sensitive talks.