8. David Koch, 78, $60 B, Charles Koch, 82, $60 B, Koch Industries Americans for Prosperity Foundation Chairman David Koch speaks in Orlando, Fla. The United Negro College Fund announced a $25 million grant from Koch Industries Inc. and the Charles Koch Foundation, a large donation from the conservative powerhouse Koch name that Democrats have sought to vilify heading into the 2014 mid-term elections. (AP Photo/Phelan M. Ebenhack, File)
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