Among the groups that have backed the right-wing law firm in the union case are entities used frequently by the billionaire brothers Charles and David Koch. Politico has reported the Kochs’ political machine now eclipses the official Republican Party in key areas, with about three-and-a-half times as many employees as the Republican National Committee. Meanwhile, a new book on the Koch brothers by New Yorker journalist Jane Mayer reveals the Koch brothers’ father, Fred Koch, helped build an oil refinery in Nazi Germany—a project approved personally by Adolf Hitler.