Chapter 3 describes in detail the data sources and research designs used throughout the book, including observational data sources, experiments on national samples of American citizens, and panel surveys tracking the same people over time. It also summarizes aggregate public opinion on key variables through time, including approval, confidence, trust, procedural perceptions, and broadly targeted and narrowly targeted Court-curbing. The chapter concludes that the Court’s “reservoir of goodwill” within the American public is not as deep or wide as many scholars suggest.