Even if the MSM and everyone else decrees that Joe lost or was sexist or whatever BS the Republicans come up with, it is still unquestionable that Joe is qualified to be President and thus, is a great VP. The traditional thinking of "You're voting for the top of the ticket" fits here too because Obama is considerably younger compared to McCain while assassination fears have eased for Obama with the Secret Service's help. Plus, Joe's made so many little gaffes that he's pretty much gaffe-proof. The Republicans can try to make a big deal out of whatever supposed misstep Joe does but Joe's so fucking genial that it'd be really easy to spin it as "WTF are you picking on Big Joe for?" especially since Joe's been much more forthcoming and welcoming with the press than Palin has. So, like Obama, Joe also has a preternatural tendency to just brush things off and let them slide right off his back.
Not so with the McCain-Palin ticket. A fuck up on Palin's part, which is increasingly certain, would kill the diminishing views of Palin as a qualified candidate with
executive experience (please note my dripping sarcasm on that retarded fucking phrase

). And a view of Palin as a valid and experienced addition to the ticket is also closely intertwined with McCain's image as a maverick/reformer so McCain has a greater need to promote Palin than Barack needs to do with Joe. Also, if Palin fails, McCain fails because then his image as a maverick gets redefined as maverick/fickle rather than maverick/outsider. This is all about semantics and connotations here, which are rather important in politics despite the strong current of anti-intellectualism or the common tendency to abuse the English language.
So yes, I don't think we need to worry too much.