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New Obama Ad Knocks McCain On Economy

Building on the momentum it seems to think it scored from John McCain's "houses" gaffe, the Obama campaign has released a new negative TV ad hitting McCain on the economy.

Entitled "Don't Know Much," the 30-second spot resurfaces a McCain quote from late 2007 that the presumptive Republican nominee probably wishes he could take back: "Economics is not something I've understood as well as I should."

The idea that McCain is not well-versed on economic issues is the same line of attack McCain's former GOP rival Mitt Romney employed in the run up to the critical Florida primary.

The ad also highlights McCain's ties to President Bush and includes the infamous photograph of the Arizona senator embracing the president.

Watch "Don't Know Much" Below: