He won't.
And I'm glad.
I read the Indictment {all 22 pages} and then went to the US Code of jusitce to see what Title 18 Section 793 {and all of the other litte subsections, 100, 1053 etc} were all about.
This section of law was written to be able to prevent {or later prosecute} any person from giving military secrets about ships, shipyards, and other very specific military, classfied secrets to anyone not entitled to receive them.
Since valerie was not covert, fitzzy could not use the law that was charged in the original investigation {if there was no crime, there was no cover up} so he dug around and found another nebulous law, which could be strecthed into an indictment.
This case is so weak that if a person's entire life were not in chaos, it would be funny. Now Libby is out of the WH, but he will have to spend millions of dollars and years of his life, disproving some spurious charges, about whether it was raining on July 23, 2003 when he looked out his window, and thought about valerie and joe.
After two years, a mid level staffer gets indicted, using a law about the secrecy of shipyards. All of the other charges, perjury, obstruction etc. all flow from this statute}. What a msierable system, that allows a prosecuter, the power over anyone, without any check or balance. That is the real danger of a "special prosecuter" for this one investigation, he has no boss. He can't be fired, no matter how badly he is screwing up, The Attorney General, the Congress, The President, no one can stop him, until he feels like quitting. Too much power, no oversight {except the eagle eyes of the press}.