With his post convention bounce, trounced by McCan-Palin, Obama will have no choice to go on the attack and go negative.
Team McCain has laid out a positive message and has let Palin and her gang attack Obama. Obama will be vilified by women if he attacks Palin and drive them McCain.
So he will have no choice but to attack McCain and defend his character. That should eventually fail because of the promises that Obama made about running a uplifting campaign! The more he attacks the less energized his base is going to be.
Exactly the kind of scenario that team McCain wants.
We will see how this gets played out. Team McCain seems to have gamed these scenarios very well.