(Image Credit: Andrew Burton/Getty Images)

COLUMBUS, Ohio-The Rick Santorum campaign is out with a new 60-second radio ad that will start airing today nationwide hitting Mitt Romney on his conservative record, or lack thereof.

"Mitt Romney vs. Rick Santorum, let's review the facts," the narrator says. "While Romney was writing a personal check funding Planned Parenthood, the largest abortion provider in the country, Rick Santorum was writing the law that ended partial birth abortions forever."

Romney's wife Ann donated to the organization in 1994 and a photograph popped up on the campaign trail during the last cycle, reported by the Boston Globe, that seemed to show the former Massachusetts governor at a Planned Parenthood fundraiser. The group provides women's health services in addition to abortions.

"While Romney supported the taxpayer bailout for his Wall Street millionaire buddies, Rick Santorum opposed the bailouts," the narrator says touting Santorum's work on entitlement reform.

The ad points out that Romney supported the Troubled Asset Relief Program, which bailed out the financial industry, but opposed the auto bail out. Santorum opposed both.

It ends digging the knife in deeper:

"Mitt Romney he may have lots of money for lots of TV ads, but Rick Santorum has something Mitt Romney will never have: a conservative record to run on."

The campaign won't release the details of the buy or exactly where it is airing, but Super Tuesday is just four days away when 10 states vote.

The Romney campaign responded to the Santorum radio ad saying Santorum is "lashing out" because he "lost Arizona and Michigan."

" Four years ago, when he was speaking candidly, he said Mitt Romney would 'stand up for the conservative principles that we hold dear.' In comparison, Sen. Santorum admitted he 'took one for the team' in Washington by voting against those principles. This is yet another case of Sen. Santorum abandoning principle for his own political advantage," Romney spokesperson Andrea Saul said in a statement.

This story has been update since it was originally posted.