Brothers Charles and David Koch are the subject of the new book Sons of Wichita: How the Koch Brothers Became America's Most Powerful and Private Dynasty. The author, Daniel Schulman, describes the Kochs as having pumped hundreds of millions into remaking the American political landscape, trying to bring their libertarian views into the mainstream.
In addition to backing individual candidates who reflect their views, the Koch brothers have played key roles in the Libertarian Party and in the formation of the Tea Party. Their father, who founded Koch Industries, was also a founding member of the far right group the John Birch Society.
Koch Industries is now the second largest private corporation in the U.S., with $115 billion in annual revenue and a presence in 60 countries. Charles and David are tied in sixth place on the list of the wealthiest men on the planet.
Daniel Schulman is a senior editor in the Washington bureau of Mother Jones, and a founding member of the magazine's investigative journalism team. He tells Fresh Air's Terry Gross about how the Kochs have contributed to today's political landscape.