(CNN) Former President Bill Clinton defended his namesake foundation Wednesday, insisting that the allegations in the book "Clinton Cash" are baseless and "won't fly."

"There's just no evidence," Clinton said in an interview with CNN's Christiane Amanpour. "Even the guy that wrote the book apparently had to admit under questioning that we didn't have a shred of evidence for this, we just sort of thought we would throw it out there and see if it flies, and it won't fly."

"Clinton Cash" author Peter Schweizer, who alleges in his book that foreign donations to the Clinton Foundation influenced Hillary Clinton's decisions as Secretary of State, has conceded that he has "no direct evidence" to support his claims, but insisted "the smoking gun is in the pattern of behavior."

The Clinton Foundation admitted that some foreign donations were not correctly reported in tax filings, but the former president chalked that up to inadvertent mistakes.

"That was just an accident. People re-file their taxes all the time," Clinton said Wednesday.

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