Washington (CNN) The Clinton Foundation, fighting back against charges of conflict of interest in a forthcoming book, is trying to tamp down a growing political problem by admitting that it made "mistakes" as the philanthropy grew but maintaining that it did not intentionally do anything wrong.

In a blog post out Sunday, Foundation acting CEO Maura Pally reaffirmed its commitment to transparency, but nevertheless said some errors had occurred.

"Yes, we made mistakes, as many organizations of our size do, but we are acting quickly to remedy them, and have taken steps to ensure they don't happen in the future," Pally wrote.

While the details of the Clinton Foundation's operations are complex and date back almost a decade, they have thrown a wrench in the "ramp up" period of Hillary Clinton's presidential campaign. Instead of focusing solely on early presidential states, like the campaign had hoped, many of her top aides spent the last week answering questions about the foundation and its tangled relationship to numerous foreign donors.

In a new book "Clinton Cash," writer Peter Schweizer alleges that the Foundation, led until recently by likely Democratic presidential candidate Hillary Clinton, let some donors to the foundation have undue influence on the charity's work and State Department actions. Schweizer said Sunday that he did not have "direct evidence" of ethical misconduct, but said the pattern he uncovered should raise eyebrows and trigger an investigation.

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