Much has been written about John McCain's latest television ad -- the one that compares Barack Obama to Britney Spears and Paris Hilton -- in the less-than- 24 hours since it was unveiled. (Click here for Greg Sargent's assessment.) But missing so far from the commentary is a rap against the sexism that imbues the ad's message.

Over images of Hilton and Spears interspliced with those of Obama's Berlin speech before hundreds...