Obama's infomercial: "risky overkill"?

So asks Politico's Jeanne Cummings. But she can't really get anyone to take the bait. That includes GOP strategist Mike Murphy, who says: "I don't see any risk at all."

I don't see it either, largely because the whole Obama-as-celebrity thing has already run its course. But you know what does worry me a bit? This new Obama spot targeting A) McCain's lack of economic expertise and B) his decision to pick Sarah Palin as his running mate: 

It's clever, and liberal partisans are going to love it. So what? If the polls are to be believed, Palin's already a drag on the ticket. Why take the risk of attacking her--however gently--and possibly alienating undecided voters in the campaign's final days?