The Constitution of the United States is the foundational document that defines the United States government and citizens' rights.
Federal regulations are rules with the power of law created by federal agencies that assist agencies in carrying out laws.
The federal rules of practice and procedure govern the fundamental scope and operation of the federal courts.
The PACER Case Locator is a national index for U.S. district, bankruptcy and appellate courts. The system serves as a search tool for PACER, and you may conduct nationwide searches to determine whether or not a party is involved in federal litigation.
Congress.govshows federal legislation on the way to becoming law.
For other decisions see also:
US Supreme Court cases
First Circuit (cases from January 2000 - )
Second Circuit (cases from January 1995 - )
Third Circuit (cases from 1997 - )
Fourth Circuit (cases from January 1995 - )
Fifth Circuit (cases from December 1990 - )
Sixth Circuit (cases from November 1994 - )
Seventh Circuit (cases from 1989 - )
Eighth Circuit (cases from November 1995 - )
Ninth Circuit (cases from 1995 - )
Tenth Circuit (cases from 1995 - )
Eleventh Circuit (cases from January 1995 - )
District of Columbia Circuit (cases from January 1995 - )
U.S. Court of Appeals for the Federal Circuit (cases from May 2005 - )
US Courts of Appeals and US District Courts via Google Scholar