The Library of Congress hosts this site for congressional material. The legislative material goes back to at least 1989 with Public Laws available from 1973 to the present. Thomas also hosts the Congressional Record from 1995 to the present. Schedules for both houses of Congress are available as well.
Search for full-text Congressional Research Service (CRS) reports. CRS is the public policy research arm of the U.S. Congress. This legislative branch agency works exclusively for Members of Congress, their committees, and their staffs.