Well the statute of limitations to charge him with a crime ran out just few days ago. I am not sure if a congressional investigation would have stopped the clock or not. But I doubt it. Congress wouldn’t ask DOJ to charge him anyways.
what is this?
22 March - Twitter: Julian Assange: DoJ appears it will issue indictments against state backed hackers tomorrow. Deputy Rod Rosenstein announcing. John Demers, head of National Security division. Treasury’s top intelligence official and US attorney for Southern District of NY also present. MEDIA RELEASE
https://twitter.com/JulianAssange/status/976992501696466944