Please see my post above if it remains, about what prosecutors are taught in order to sway juries. You are right on, McCain allowed Obama to lie again and again. He can’t do that and win.
If the negatives are held back until the last minute before the election, they will not be very effective. People view last minute negative ads as a desperation move.
IMHO it’s probably already too late.
Why won't he tell people what happened? He is responding just like George Bush.