The father of the billionaires Charles G. and David H. Koch helped construct a major oil refinery in Nazi Germany that was personally approved by Adolf Hitler, according to a new history of the Kochs and other wealthy families. The book, "Dark Money," by Jane Mayer, traces the rise of the modern conservative movement through the activism and money of a handful of rich donors: among them Richard Mellon Scaife, an heir to the Mellon banking fortune, and Harry and Lynde Bradley, brothers who became wealthy in part from military contracts but poured millions into anti-government philanthropy. Continue reading the...