A day after singling out Rick Santorum as a "prolific earmarker," Rick Perry stepped up his assault on the former Pennsylvania Senator.

During a campaign stop Friday in Waterloo, Iowa, Perry fired off a double barreled blast. "Senator Santorum, just to get a little more specific here, please tell me why you asked taxpayers to support the bridge to nowhere in Alaska. Why did you ask the taxpayers of Iowa to support a teapot museum in North Carolina. Why were those important enough for you to vote for?"

Perry didn't stop there. "Not only that, you voted to raise the debt ceiling 8 times while in the United States Senate- more than doubling the debt in this country from 4.8 trillion to 9 trillion dollars. And I got to ask you, how is that fiscally conservative? Asking a Washington insider to stop runaway spending is like asking a bank robber to guard the vault."

Santorum has been recently surging in Iowa, but a new NBC/Marist poll released Friday shows Perry is within striking distance with 14%. That's just one point behind Santorum.

Both candidates are competing with Congresswoman Michele Bachman for the support of evangelicals, a critical bloc of caucus-goers in the Hawkeye State.