NEW YORK – The Clinton Foundation is a "piggybank, a slush fund and a criminal organization,” charged author Edward Klein in an interview with WND.

Klein noted that in 2009, Hillary and Bill Clinton signed a Memorandum of Understanding with President Obama that the Clinton Foundation would not take donations from foreign governments or foreign businessmen while she was secretary of state.

“The Clintons also agreed that Bill would not make any speeches without first clearing them with the Obama administration,” Klein noted. “As we know, the Clintons violated both of those agreements.

“Bill made speeches without clearing them with the White House. More important, Hillary spent a great deal of her time on Clinton Foundation business from her office at the State Department.

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Klein said that for his book "Unlikeable: The Problem With Hillary," he interviewed three people who saw documents at the State Department clearly labeled "Clinton Foundation" and "Clinton Global Initiative."

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"Those documents were on Hillary’s desk, on her conference table and in manila folders that she carried with her when she flew on foreign trips," Klein said.

“One of these eyewitnesses heard Hillary on the phone talking to potential donor to the Clinton Foundation.”

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Klein noted Hillary Clinton was one of several U.S officials who signed off on an agreement to sell a substantial proportion of the uranium production facilities in the United States to a Russian organization that was dominated by the Russian government.

“And shortly after Hillary Clinton signed that agreement, Bill Clinton was invited to Moscow, where he was paid a million dollars to give two speeches," Klein said.

'Clinton slime room'

Klein said he has been attacked by what columnist Maureen Dowd has dubbed the "Clinton Slime Room."

Dowd wrote in the New York Times on Feb. 14, 2014, that the Clintons had a “War Room” during the 1992 presidential campaign headed by James Carville that has been replaced today by a “Slime Room” headed by Media Masters leftist David Brock.

The “Clinton Slime Room,” Dowd said, launches ad hominem attacks against ideological opponents of the Clintons who dare to draw attention to any of the numerous scandals that have punctuated Hillary Clinton's political life.

“The denizens of that slime room, including Hillary’s pasty-faced Reich minister of propaganda, David Brock, used the same exact words to try to debunk [Peter] Schweizer [who wrote "Clinton Cash"] as they used to try to debunk me – calling our work ‘fiction’ and referring to each of us as ‘a discredited author,’” Klein pointed out.

“The Clintons never answer accusations; they try to discredit the person who makes those accusations," he said.

"They go after the person’s credibility rather than the substance of the argument. They get away with that in large part because they have many friends in the mainstream media, and they are constantly on the phone giving those reporters talking points.

“As a result,” Klein said, “the mainstream media has not investigated the extent to which the lifestyles of Bill, Hillary and Chelsea are supported by Clinton Foundation money. Does Bill Clinton spend a penny of his personal fortune on anything that he does, such as flying around the world in private jets? Or is everything expensed through foundation charge cards?”

WND asked Klein what he thinks is the appropriate defense against the personal attacks.

“In order to answer those questions, you need to get hold of the ledgers of the Clinton Foundation, which would show how much of the money it raises goes to supporting the Clintons and their royal life style. I feel confident that, sooner or later, some investigative reporter will hit pay dirt and provide the American public answers to these important questions.”

Klein has a history of bestselling books that attempt to do exactly that, including his 2005 exposé “The Truth About Hillary: What She Knew, When She Knew It, and How Far She’ll Go to Become President.”

Then, in 2014, Klein authored “Blood Feud: The Clintons vs. The Obamas,” documenting the continuing rivalry between the two most dominant Democratic Party husband-wife teams in the last 25 years.

His current bestseller, “Unlikeable: The Problem with Hillary,” characterizes Hillary Clinton as an arrogant, nasty, untrustworthy, and calculating character.

Edward Klein’s new book about Hillary Clinton, “Guilty As Sin,” will be published Aug. 22 and is available for pre-order on Amazon.