I am sure FBI will find that "Although there is evidence of potential violations of the statutes regarding the handling of classified information, our judgment is that no reasonable prosecutor would bring such a case." as it usually does in cases of leaking classified info :) :) :)
He's going to be court martialed for a UCMJ Article 106(a) violation. Even if he were hauled up in a civilian court, he's got nothing to bargain with -- he transmitted classified military and IC docs to foreign citizens for the Discord clout, so has nothing to graymail with and no information about foreign intelligence services to trade. Dude's absolutely, completely, comprehensively screwed, and is going to spend the next few decades bunking in a Leavenworth six-by cell.
Yeah secretary of state having IT set up a server for her blackberry in 2006 is the same as a 22 year old forcing 16 year olds on his discord to read top secret docs