It will not have one iota of effect on the election.
Tenet's job is done. Seven years is a long time in this job, as Boyden Gray says.
I just don't see how, when we see the effect of media coverage on Iraq and the 9-11 commission in polls, that anyone could say that. Look at the polls from the time after Saddam was captured to now - both for the Bush re-elect and public opinion about the war, etc.
How is this Tenet resignation going to do anything other then foster another media feeding frenzy to drive those lower? Bush was doing better lately, the 6/30 handoff particulars in Iraq was going well, soldier losses have been lower - and now this.