He didn’t leak, he published.
That’s what’s so concerning about the case. The USA tried to persecute an Australian citizen working out of the EU for publishing information.
If precedent was set they could kidnap anyone from sovereign countries based on US law
As a terrorist they could torture and kill him without covering anything up.
https://www.abc.net.au/news/2021-10-01/julian-assange-supporters-write-to-pm-over-reported-cia-plot/100504522