Romney is leading a horse to water...by mentioning that Obama cares about the middle class, he is leading people to listen (it's not an attack ad, so it gets peoples' attention); and then once they think about it, they say, "It doesn't matter if Obama cares or not, he's still ruining things."
And then they take out their anger in the voting booth against Obama, who promised skittles and unicorn farts, and who said that caring is all that matters ("this is the moment...the planet began to heal.")
Cheers!
I hope you are right, I hope it turns out like that