My memory is the US was trying to extradite Assange to the US and was threatening to charge him with Sedition with a possibility of decades of prison time. That was at least the stated intent of the previous CIA director
i was never clear on how you can charge a foreign national on foreign soil with a US Crime but that doesn't seem to mater when your the US. dont piss of the US government and dont piss off the MPAA Kim Dotcom and Assange were both charged with breaking us law while not residing in the US, being from the US, or committing their alleged crime in the US.
No. Until the recent convictions in relation to January 6th, the most recent US conviction for sedition was against an Egyptian for his role in the 1993 World Trade Center bombing. He died in federal prison.