Contains the current US Code, United States Statutes at Large, the text of current/past bills, and committee reports.
United States Government Publishing Office
Contains the Congressional Record, Congressional Reports and Hearings, the Federal Register and Code of Federal Regulations, and executive documents.
This is a very expensive subscription database that is quite nearly comprehensive. It contains nearly all available congressional documents including committee reports/prints, hearings, CRS Reports, session laws, etc., etc.
Heafey Law Library Research Team