(CNN) - Planned Parenthood reported on Wednesday raising $400,000 in the 24 hours following its announcement that a major backer, the Susan G. Komen for the Cure Foundation, was ending its partnership with the group.
The major breast cancer research group cut its funds for breast screenings at Planned Parenthood amid increased scrutiny from Congress over how the prominent family planning organization provides abortion services.
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In a statement Tuesday, Planned Parenthood said the Komen Foundation had "succumbed to political pressure," and on Wednesday, a spokesperson said its supporters responded in droves.
About 6,000 donors gave online contributions starting Tuesday afternoon through Wednesday afternoon, as news of the decision made headlines.
"People respond powerfully when they see politics interfering with women's health. That's why we've seen a tremendous outpouring of support," said Andrea Hagelgans, spokeswoman for Planned Parenthood.
The Komen Foundation denied Wednesday the decision stemmed from politics and said the move had been widely mischaracterized.
Instead, the group insisted the decision was part of a "new granting strategy" that enforces "more stringent eligibility standards" for its grantees. As a result, the group said, Planned Parenthood was one organization that no longer qualified for grant money.
The statement did not elaborate on how Planned Parenthood failed to meet the foundation's new criteria.
"Some might argue that our standards are too exacting, but over the past three decades people have given us more than just their money. They have given us their trust and we take that responsibility very seriously," the group said in a statement.
Nancy Brinker, the founder and CEO of the Komen Foundation, was a political appointee of the George W. Bush Administration, in which she served as U.S. Ambassador to Hungary and as Chief of Protocol. Susan G. Komen was Brinker's sister.
In September, the House Committee on Energy and Commerce began an investigation of Planned Parenthood over the organization's "compliance with federal restrictions on funding abortions."
Planned Parenthood said funding from the Komen Foundation had largely paid for breast exams at local affiliates. In the last five years, grants from the group have directly supported 170,000 screenings, comprising about 4% of the total exams performed at Planned Parenthood health centers nationwide, according to the group.
– CNN's Ashley Killough, Mary Snow and Sara Pratley contributed to this report.