Earlier quoted context omitted.
Responsibility has to be pretty defuse, right? You can at least begin with all the presidents in office since he was prosecuted, until N-1 since presumably the Nth just released him.
A lot of Assange supporters are going to feel weird about giving Biden credit for his release, especially since Biden was part of the administration that initially decided to pursue Assange.
Supporting transparency and good journalism isn't a partisan issue, and there are going to be good people in any administration. Plus Assange wasn't annoying presidents, he was going after people in the deep state.