It doesn't resonate with me when Obama makes fun of McCain for not knowing how many houses he owns.  As absurd as it is to not know how many houses you own, it seems out of character for Obama to talk about it like he does in this video.  It also has little to do with actual policy positions. That said, he is just fighting back and McCain has done his fair share of negative campaigning thus far.  The funny thing is, it'll probably work because people love to vote based on which candidate is more "in touch" with the average American - which is ironic, because a major party nominee for president, by definition is not average.