Aye, he’s got a difficult job:

The attorney general, Lord Goldsmith, a close political ally of the
prime minister, is preparing to advise prosecutors on whether to bring
charges in the cash for peerages inquiry, the Guardian has learned. He
will be consulted by the Crown Prosecution Service, and is expected to
give his views on whether charging Tony Blair, or anyone else, is in
the public interest.

Can he actually be as impartial as he needs to be in this particular case? One could almost argue that he has to recommend the prosecutions in order to maintain any semblance of that impartiality.

It is thought that Lord Goldsmith will consider whether prosecutions
that damage confidence in the two main political parties are really in
the public interest.

The alternative being that there is not one law in this land to which we are all subject: does that damage the public interest more or less?