Check out the new ProQuest Congressional Digital Collections! These include:
ProQuest U.S. Serial Set Digital Collection I & II from 1789 to 2010.
ProQuest U.S. Congressional Research Digital Collection including CRS reports and Congressional Committee Prints from 1830 to 2011.
ProQuest Congressional Hearings Digital Collection with full transcripts of the proceedings including all oral statements, committee questions, and discussion from 1824 to 2011.
ProQuest Congressional Record Permanent Digital Collection dating from 1789 to 2001.
They can all be accessed through ProQuest Congressional in the Database List of Research Port.