Andrew Sullivan "approves" of an Obama ad painting McCain as a big spender but complains that the ad fails to "link McCain to the last eight years of GOP profligacy." That ignores the visuals, however: the ad ends with a rear-view of McCain with Bush's arm around him, with only Bush's face visible.
Indeed, the ad is visually interesting: it begins with images of McCain facing the camera with an arm around Palin. In short, McCain is bookended: Palin looking forward, Bush looking back.
The Obama campaign is very careful not to pile on Sarah Palin with ridicule or even position attacks. Seems that at this point they consider her image enough. The ad's visual message seems to be judge McCain by the company he keeps.