A Kazakh official involved in brokering a controversial mining deal for a major Clinton Foundation donor is behind bars for his role in the transaction, undercutting a Clinton campaign "fact-check" that attempted to dismiss ethical questions about the former president's ties to the lucrative contract.

Hillary for America and the Clinton-aligned group Media Matters pushed back on allegations that the Clintons had used their political clout to drum up millions in foundation donations and speaking fees by furthering the financial interests of friends in the wake of Tuesday's publication of Peter Schweizer's Clinton Cash.

Schweizer dedicated an entire chapter to a 2005 deal in which Bill Clinton allegedly helped his friend Frank Giustra break into a fiercely competitive uranium market, setting the stage for the high-profile takeover of mining conglomerate Uranium One by Russia.

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