You are confusing being "charged" with serious offenses (Libby) and "committing" serious offenses (Clinton). If you have read anything about this phony "investigation" of non-existing "crime" of non-existing "leak" about non-existing "undercover"/"covert" CIA operative, you'd know that "investigation" shouldn't have happened at all, as the name of "leaker" Richard Armitage was known since Day 1 (OK, maybe Day 2)... well before Fitzgerald took his expansive team "on a wild goose chase", as he himself put it, around Washington, DC.
If anyone should be charged with abuse of power (for political, and now it seems, also for personal reasons) and obstruction of justice, and perjury (during press-conference charging Libby), it would be Fitzgerald himself.
Answer one question to convince yourself of that: why do you think on the eve of the trial the press that was so salivating about minute details and rumors around this "investigation" is suddenly so quiet and uninterested, except sometimes repeating what has been "alleged" as a serious crime which they now know has not happened at all?
Try reading some posts of few months back on these threads:
http://www.freerepublic.com/focus/keyword?k=libby
http://www.freerepublic.com/focus/keyword?k=cialeak
Think "Mike Nifong", DA in Durham, NC - he "charged" 3 young people with really very "serious crime"... abused his power for political and personal gain, tell me why he shouldn't be disbarred, at the very least.