It's worth noting that Manning, his alleged co-conspirator in this thing, was declared guilty by Obama, in public, before her trial ever began (when she was, under the law, to be presumed innocent). She was also tortured in jail prior to conclusion of the trial, to such an extent that she attempted suicide twice.

The extradition is only rational, legal, and judicially legitimate if he can be expected to receive a fair trial and not be tortured before/during/after. None of these assumptions hold true in the United States, as we both know.