ATLANTA >> A high-ranking official resigned today from the Susan G. Komen for the Cure breast-cancer charity after a dispute over whether the group should give funding to Planned Parenthood, according to a letter obtained by The Associated Press.

Karen Handel, the charity’s vice president for public policy, told Komen officials that she supported the move to cut off funding for Planned Parenthood. She said the discussion started before she arrived at the organization and was approved at the highest levels of the charity.

"I am deeply disappointed by the gross mischaracterizations of the strategy, its rationale, and my involvement in it," Handel said in her letter.  "I openly acknowledge my role in the matter and continue to believe our decision was the best one for Komen’s future and the women we serve."

Handel had supported a decision that Komen announced last week to exclude Planned Parenthood, which provides a range of women’s health care services including abortions, from future grants for breast-cancer screenings because it was under government investigation. The charity cited a probe launched by a Florida congressman at the urging of anti-abortion groups.

The breast cancer charity reversed course after its decision created a three-day firestorm of criticism. Members of Congress and Komen affiliates accused the group’s national leadership of bending to pressure from anti-abortion activists. Komen’s founder and CEO, Nancy Brinker, denied the decision was driven by pressure from anti-abortion groups.

Until today, Handel had publicly kept silent about her role in the dispute.

A source with direct knowledge of decision-making at Komen’s headquarters in Dallas said the grant-making criteria were adopted with the deliberate intention of targeting Planned Parenthood. The criteria’s impact on Planned Parenthood and its status as the focus of government investigations were highlighted in a memo distributed to Komen affiliates in December.

According to the source, who spoke on condition of anonymity for fear of repercussions, a driving force behind the move was Handel, who was hired by Komen last year as vice president for public policy after losing a campaign for governor in Georgia in which she stressed her anti-abortion views and frequently denounced Planned Parenthood. 

Brinker, in an interview with MSNBC, said Handel didn’t have a significant role in the policy change.

Handel, a Republican, ran for Georgia governor in 2010, winning an endorsement from former vice presidential candidate and Alaska Gov. Sarah Palin. Handel then lost a primary runoff to former Georgia Congressman Nathan Deal, who won the general election.

Throughout the campaign, Deal accused Handel of being soft on abortion.

Deal repeatedly attacked Handel over a 2005 vote she took while serving on a metro Atlanta county commission to give more than $400,000 to Planned Parenthood, though not for abortion services. The Georgia affiliate of Planned Parenthood said the money went to a downtown clinic for services such as cervical cancer screenings, testing for sexually transmitted diseases and birth controls.

A longstanding law bans using federal money to pay for abortions except in cases of rape, incest or to protect the health of the mother.

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AP National Writer David Crary contributed to this story.