None that I know of or no more so than if he were still with the administration. What it does is send a message to anyone else who would ‘rat’ out this administration. Remember what Jarrett said to her staffers in Chicago before the election even took place. It was to the effect that those who betrayed the One would have hell to pay. As the story goes, they all signaled their approval with the statement.
He can testify, but his testimony will be tainted. With this revelation, how can anything he says be trusted? If he says anything that would incriminate Obama, they’ll say he was vindictive.
His testimony is not worth diddley squat. Obama gets yet another lucky break. No wonder he likes Vegas so much. All his gambles pay off big.