Obama Ad Uses Winking Palin (VIDEO)

John McCain is out with his own attack ad Wednesday morning. Watch it here.

The Obama campaign is directing reporters to an ad it released Wednesday morning that goes at both John McCain's understanding of the economy and (somewhat unusually) his selection of Sarah Palin for V.P.

Titled "His Choice," the spot begins with quotes from McCain admitting his lack of economic know-how. The last one has McCain declaring, "I might have to rely on a vice president that I select" for expertise on economic issues.

"His choice?" the script (no narration) asks -- before cutting to footage of Palin winking at the vice presidential debate. "On November 4th, You Get to Make Yours."

It is considered politically taboo for a presidential candidate to go after a vice presidential candidate. To be sure, much of the ad focuses on McCain's record on the economy. But the inclusion of Palin is indicative of just how large a liability the Obama folks -- indeed, the political community at large -- thinks she has become for the GOP ticket.