https://en.wikipedia.org/wiki/Espionage_Act_of_1917
Obama revived the act and used it against John Kiriakou for exposing the US gov't torture program:
https://www.theguardian.com/commentisfree/2013/aug/06/obama-abuse-espionage-act-mccarthyism
James Risen in the New York Times gave the recent history:
https://tinyurl.com/y23n3dfe
And now it is being used to indict Julian Assange, says Martha Gessen in the New Yorker:
https://www.newyorker.com/news/our-columnists/charging-julian-assange-under-the-espionage-act-is-an-attack-on-the-first-amendment
The Guardian explains that the Trump administration has crossed another line in indicting a journalist:
https://www.theguardian.com/media/2019/may/23/julian-assange-indicted-what-charges-mean-for-free-speech
And finally for those who like a YouTube here is Scahill from the Intercept:
Miss Drake