Ads, ads, ads: Negativity

Which one of these ads is worse, dear reader?

Obama on McCain:


McCain on Obama:

It's a tough call; they both stink.

Bert and Ernie on Clinton and Obama

I don't like to cross-post with The Latin Americanist but I can't help myself on this occasion:

It’s silly.

It’s juvenile.

It has no direct relation to Latin American affairs.

Yet it’s funny:

For the record, I’m not gung-ho on any of the presidential candidates.

(Hat tip: Wonkette).