Dan Caldwell, a senior advisor to Pete Hegseth, has been put on leave amid a Pentagon investigation into an unauthorized disclosure, a defense official confirmed to CBS News.

Dan Caldwell has been placed on administrative leave due to what the official described as "an unauthorized disclosure."

The president was scheduled to sign executive orders at 2:30 p.m. Tuesday in the Oval Office before presenting midshipmen at the U.S. Naval Academy with the Commander-in-Chief's Trophy at 3:30 p.m.White House press secretary Karoline Leavitt also held a press briefing at 1 p.