If Obama cared about Nagin (or if Nagin had some dirt on Obama) then Holder would never have allowed the case to go to trial. Holder generally doesn't allow black people to be prosecuted unless they have done something to piss off the Obamas.
Obama may still pardon him, but it will not happen until after the elections in November and probably not until Obama is going out the door in 2016.
The latest here is that the drama will go on. He’s not done yet-supposedly. There are rumors of a ‘bomb’ regarding the DA’s office that will come to light and enable Nagin’s conviction to be overturned, earning him another trial. Other verdicts are supposedly going to be affected too. If true this could go on for awhile yet. This IS Louisiana, crooked politics is normal and there is much at stake if REAL justice is done. If one goes down, he takes LOTS of others with him. Could be what’s happening now. Ray Ray took his shot at charming his way out, now he may be singing and giving up others. STAY TUNED!