The Lynde and Harry Bradley Foundation is claimed to be the largest and most influential right-wing think tank in the USA, with about half a billion $US in assets. It's based in Milwaukee, Wisconsin.
For example, it provides funds to the Heritage Foundation, the Madison Center for Educational Affairs and the American Enterprise Institute and is believed to fund the Project for the New American Century via the New Citizenship Project.
From 1986 to 1989, the Bradley Foundation gave Charles Murray an annual grant of $90,000, rising to $113,000 by 1991, and then to $163,000 following publication of "The Bell Curve: Intelligence and Class Structure in American Life" by Murray with coauthor Richard Herrnstein . In this book, the authors claimed to find scientific evidence for racism. The methodology was widely considered to be incorrect, despite the use of statistical tools, and was denounced by the American Psychological Association. Much of its empirical data collection was financed by the Pioneer Fund, a neo-Nazi organization associated with eugenicist research.