The correct answer to the following question will be "SecDef ".
Explanation:
SecDef (Secretary of Defence) seems to be the U.S. Defense department's boss and chief executive, the U.S. Army's executive or judicial branch. It command and control role over most of the U.S. Army is comparable to more than just the presidents.
It may accept the enforcement of law requests from civilian authorities or eligible agencies that require federal military assistance or help.