Anything related to Syria is far to esoteric to matter a whit to anyone dumb enough to be undecided at this point.
Nothing from here on in can be a bombshell or October Surprise other than some domestic pecadillo like Bush's DUI or something.
Anyway, I'd be willing to bet that most Americans (and 95% of democrats) think that Syria is what you put on your French Toast or waffles.