Dan Caldwell previously worked for an Arizona congressman and was outspoken about the Phoenix VA hospital scandal a decade ago.

Dan Caldwell, a top adviser to Secretary of Defense Pete Hegseth, was put on leave this week amid an investigation into leaks at the Department of Defense. Caldwell was escorted out of the Pentagon on Tuesday and placed on administrative leave for “an unauthorized disclosure,

By Phil Stewart WASHINGTON (Reuters) -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,