MCCAIN’S CHOICE…. Two weeks ago, A.K., a long-time regular, emailed me, asking why the Obama campaign wasn’t hammering McCain in a television ad for admitting he doesn’t understand the economy.

A.K., I have good news for you.

In this new spot released this morning, there’s no voice-over, just on-screen text: “John McCain in his own words.” Then we see the first quote: “I’m going to be honest: I know a lot less about economics than I do about military and foreign policy issues. I still need to be educated.” Then the second: “The issue of economics is not something I’ve understood as well as I should.” And the third: “‘I might have to rely on a vice president that I select’ for expertise on economic issues.”

“His choice?” the ad continues, just before showing Sarah Palin, winking at the Rich Lowry during the vice presidential debate.

“On November 4th,” the ad concludes, “you get to make yours.”

The ad is a two-fer — it reminds viewers that McCain, by his own admission, doesn’t know a thing about the economy, and almost as importantly, tells viewers that McCain will rely on Sarah Palin for economic advice.

It’s a pretty devastating spot, and for Democrats, I suspect it will be one of the more satisfying negative ads of the campaign cycle.

Steve Benen

Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.