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Oklahoma oil billionaire Harold Hamm didn't wait long to make a nearly $1 million donation to a group supporting Republican presidential candidate Mitt Romney after he became one of Romney's top energy advisers in March. Just weeks after Hamm joined
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The 66-year-old Hamm is CEO of Continental Resources Inc. (CLR). Hamm ranked 36th on Forbes magazine list of the 400 wealthiest Americans. His stake in Continental Resources alone is worth 11.2 billion. It is only
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