"Governor Romney will not back down from his pro-life position, despite this group's attempts to weaken the party platform and promote Mayor Giuliani's pro-choice candidacy," Madden said.

The ads come as Romney is facing a serious challenge in Iowa from former Arkansas Gov. Mike Huckabee, a favorite among many religious conservatives and a critic of abortions. At the same time, Giuliani is ramping up his campaign in New Hampshire and would benefit from Romney stumbles in Iowa.

In 2002, Romney sought and obtained the endorsement of the Republican Majority for Choice. Stockman said the group decided to run the ads during a board meeting in October in New York.

"If we weren't so betrayed by the dishonesty of Mitt Romney's actions, we would not be running ads," Stockman said.

The ad is the second by a group opposed to Romney to cite his record on abortion. Last month, the Log Cabin Republicans, a group that advocates gay rights, aired an ad in Iowa and national cable that sought to undercut his support among social conservatives.

The new TV spots will air in Iowa during Sunday morning talk shows, including NBC's "Meet the Press" and ABC's "This Week" and during other news programs Sunday and Monday.

In 2002, while Romney was running for governor of Massachusetts, he sought the endorsement of the Republican Majority for Choice and filled out their one-page questionnaire and submitted his own attachment. In the questionnaire he checked off "yes" to a series of questions, including: "Do you support a woman's constitutional right to a safe and legal abortion without government interference, as defined by Roe v. Wade?"

He also checked off "yes" when asked if he backed "state Medicaid funding for abortions for poor women" and "yes" again when asked if he supported removing "anti-choice language form the National Republican platform."

Asked in the questionnaire if he considered himself pro-choice or anti-choice, Romney added an attachment that stated: "I prefer not to use labels pro-choice or pro-life as they are overly simplistic. My position is clear. I will preserve the right of a woman to choose as provided under current Massachusetts law."

The television ad shows images of Romney during his 1994 race for the U.S. Senate voicing support for abortion rights, followed by a 2001 quote in the Salt Lake Tribune where Romney stated that "I do not wish to be labeled pro choice." The ad then shows Romney in a 2002 gubernatorial debate stating his support for a woman's right to choose and then in 2007 stating that he would like to see the landmark abortion case, Roe v. Wade, overturned.

"Take a stand Mr. Romney," a narrator says. "On behalf of the Republican Majority for Choice, ask Mr. Romney to flip-flop just one more time. And stay there."

Stockman said the campaign is likely to expand. "This is not the end of it," she said.