I fail to appreciate how there can be a retroactive legitimization of actions that were clearly unconstitutional and illegal at the time they were taken. For example, how do you legitimate or sanitize prolonged and illegal detention, denial of counsel during the first several years of his detention, coerced interrogation--I could go on. These things cannot be remedied by subsequent later compliance by the U.S. with a prosecution that is already fatally flawed and deemed to have been illegal.
On May 27th, 2008. See this statement in context.