Is there anything stopping the Justice Department, other than fear of being criticized by the New York Times, from investigating Wilson on its own for leaking classified information to the press. Wouldn't details of his trip to Niger fall into that category? That isn't part of the Special Prosecutor's charge as I understand it.
It is also illegal to use the CIA for political means, but when has a Dim been dealt with properly for breaking the law? Berglar? Not.