Undecided's always go overwhelmingly for the President in wartime.
Kerry failed to show that he should replace a sitting President in wartime.
Kerry will be remembered for his 'global test' statement and that will make people uneasy with his ability to respond to terrorist threats.
All three of your responses beg the original question: Do undecided voters look at substantive issues? You seem to think they do. I'm not so sure.