The Congressional Research Service (CRS) researches public policy for the US Congress. It issues about 3,000 briefs, reports, short issue papers and longer position papers per year on topics under study by Congress; these papers are brief - under 50 pages. It is renowned for its non-partisanship and in-depth analysis.
Note: CRS Reports do not become public until a member of Congress releases the report.
General Search Site
Note: Sites have some but not all available reports, so check all to be complete.
CRS Reports - hosted by UNT Libraries collections all they find online back to 1990
Congressional Research Service Reports - unofficial collection of CRS reports on national security-related topics.