I'm not convinced a mole is necessary for that. I suspect the administration is in such disarray at this time, the paranoia is at all time highs, with Obama affected the most. A mole, if true, would just be icing on the cake.
The closer we get to election day, the more inept and out of his depth Obama shows himself to be. His appearance on Stewart's show made him look pitiful instead of presidential. Stewart was in far more control than Obama could hope to be on even a good day.
Three world leaders have a real dilemma.
Saddam Hussein has 1000 body guards. He knows one of them is a CIA agent. But he doesn't know which one.
Mitterrand of France has 1000 mistresses. He knows one of them carries the AIDS virus. But he doesn't know which.
Jimmy Carter has 1000 economic advisers. He knows one of them is actually intelligent. But he doesn't know which.