"The Congressional Research Service (CRS) provides comprehensive research and analysis on all legislative and oversight issues of interest to Congress. CRS assists Congress by responding to specific questions and by preparing reports on legislative issues in anticipation of questions and emerging issues. CRS works with Members, committees, and congressional staff to objectively, authoritatively, and confidentially identify and clarify policy problems, assess the implications of proposed policy alternatives, and provide timely responses to meet immediate and long-term needs." (United States Government Manual, 2012)
Before September 2018, the CRS had not made its reports directly available to the public, making them difficult to find. Listed here are some sources for CRS Reports. None of these sources is comprehensive.