And around and around we go: Here's Obama's new radio ad responding to Hillary's ad from yesterday accusing Obama's earlier ad of being misleading because it said Obama doesn't take money from oil companies.

The new ad -- which you can listen to here -- seeks to persuade the blue collar and lower-middle-class voters who comprise a key Hillary constituency that Obama, too, feels their economic pain:

"Across Pennsylvania, we're living the problems: An economy in shambles. Families struggling. Gas prices close to $4 a gallon. What's Hillary's answer? Misleading negative ads."

Recent polls show Hillary with a double-digit lead among Pennsylvania voters who cite the economy as a driving concern, but Obama has shown that he's been able to start making gains among some of her core constituencies in the state.

Late Update: Full transcript after the jump.

SCRIPT – “Fill”

Across Pennsylvania, we're living the problems.

An economy in shambles. Families struggling. Gas prices close to four dollars a gallon.

What's Hillary Clinton's answer?

Misleading negative ads.

Here's the truth.

While she's played political games, it's Barack Obama who's taken on the oil companies, demanding higher gas mileage standards and a larger investment in alternative energy.

It's Obama who's worked to strip tax breaks from the oil giants as they roll up record profits.

And he's the only candidate who doesn't take a dime from oil company PACs or lobbyists. The only one.

The Federal Election Commission reports that Clinton's taken more from Big Oil and other PACs and lobbyists than any other candidate, Democrat or Republican.

The same old Washington politics isn't going to lift our economy or bring down gas prices.

So if you've had your fill of that...

Vote for change we can believe in, Barack Obama for President.