I'm not a lawyer, but as I understand the criminal responsibility largely starts when you get the security clearance and sign on the dotted line. That's why that idiot Manning who stole the documents in the first place will never see the light of day - he signed, and he broke his promise.
But the Wikileaks owner seems to be a foreigner, and he has no legal duty to safeguard any secrets of the USA. I don't know if the US journalist can be today indicted for that (see the 2006 law,) but a foreign publisher ... doubtful. Mr. Assange, an Australian, signed nothing, and probably haven't been to the USA recently. If he stays away from the USA he is probably safe.
Here is a discussion on the subject.
” ... Mr. Assange, an Australian ... “
Thanks for the information. It would seem that US Government could put pressure on Australia government to convince Mr. Assange that his self interests would be best served by NOT PUBLISHING. I guess I’m thinking old school when the West had some vision of survival and what it takes.