SecNav doing the job the President has given him to do. Trump has enough on his plate to deal with. This is pretty clear cut insubordination and leaking sensitive information about the combat readiness of one of the nation’s most powerful assets.
Hopefully this is an indication that unauthorized use of unsecured email is actually a thing.
Until the SECNAV stepped in, no one from the admiral in command of the battle group to the CNO has even made a peep about it. They were wanting it to be a political hit against the administration.