Making sense of what matters most in Washington. Chase Koch is one of those billionaires who blends into a crowd without much effort—whether he's mingling with his family’s super-rich friends or the paper-pushing nerds in think tank circles, whether he's talking about the success rates of addiction recovery programs or an epic eight-hour Phish show he attended while in college. It’s not until he casually notes that his family’s reach helped him set up a conversation about the war on drugs between Snoop Dogg and his father, the 90-year-old billionaire industrialist Charles Koch , that you realize this 48-year-old from Wichita, Kansas, truly represents the next generation of raw power—one as comfortable talking Pink Floyd as principles-based management.…