Congress possesses broad regulatory powers, including the power of complete or partial preemption of state and local regulatory powers. Congress rarely enacted preemption statutes before the twentieth century, but since the 1960s such interventions have grown significantly in number, now totaling over seven hundred, and have transformed the nature of the American federal system. In Innovative Congressional Minimum Standards Preemption Statutes, Joseph F. Zimmerman provides the background and history of this critical transformation, classifying the forms these federal interventions have taken, with a focus on statutes dealing with such environmental issues as water and air quality, restoration of surface-mined areas, and still other areas that, collectively, have produced a revolution in relations between Congress and the states. Contrary to public perceptions of preemption being one-sided and heavy-handed, Zimmerman details the many variations present in these statutes that accommodate state and local interests, allowing for administrative and policy flexibility, and a generally cooperative relationship between states and localities and federal administrative agencies.

The U.S. Government Accountability Office (GAO) is an independent agency that works for Congress. The GAO watches over Congress, and investigates how the federal government spends taxpayers dollars. The Comptroller General of the United States is the leader of the GAO, and is appointed to a 15-year term by the U.S. President. The GAO wants to support Congress, while at the same time doing right by the citizens of the United States. They audit, investigate, perform analyses, issue legal decisions and report anything that the government is doing. This is one of their reports.

The Congressional Record is the official record of the proceedings and debates of the United States Congress. It is published daily when Congress is in session. The Congressional Record began publication in 1873. Debates for sessions prior to 1873 are recorded in The Debates and Proceedings in the Congress of the United States (1789-1824), the Register of Debates in Congress (1824-1837), and the Congressional Globe (1833-1873)