why rewriting FISA would be an admission of Bush's guilt

Good eye, TChris. He points out that the gutless Pat Roberts's plan to rewrite FISA in order to make Bush's actions legal retroactively is a tacit admission that Bush broke the law.

Republicans continue to back away from Sen. Roberts' suggestion that FISA be "fixed" to better allow court review of NSA's domestic wiretaps. "I'm not sure that's exactly what Pat meant,'' said Chambliss, a Georgia Republican, on CNN's "Late Edition.''

Good insight. What this implies is that they'll have to leave the law to stand. And that means that Justice can still investigate Bush's authorizations as illegal.