I've wondered that too; but some (including Rush, on-air right now) are questioning whether Fitz --by going public *too early* with the Blago complaint-- is in the tank for Obama?
Byron York seems to imply that Fitz's intel flow was hampered by the "Chicago Tribune publish[ing] an article reporting that Blagojevich was under surveillance."
Freakin' Trib. They go after Blago - yet protect Obama.
Yes, reports indicate that the Dec. 5 story in the Trib. ended the prospect of further info from wiretaps -- the questions is WHO leaked that vital info to the Trib. and why? Was it Fitz's office ready to shut down its own investigation, or someone else acting to torpedo the investigation?
Either way, letting Blago and others know about the wiretaps ensured they would go into CYA mode and there would be no more incriminating recordings. Did Fitz decide his investigation had run its course or was that someone else leaking?