Policy creation is an evolutionary process, something existed to combat your social problem before the main law was enacted. What are one or two laws that were enacted BEFORE your law to combat this problem? What set the stage?
What are the PROS/CONS of these policies and their alternatives?
What is NASW's position on your social problem/program? (Book available on Reserves on 4th floor in the library)
What are the views of the Democrats and Republicans on your social problem/program at the time of your law? What were the main points and controversies at the time of the law? What was happening?
CQ Researcher - basically this is a more legitimate version of Wikipedia and a good place to look for background information on topics/problems.
ProQuest Congressional - find your original law, amendments, recent version, and congress proceedings and cases related to our law/problem
LexisNexis - especially good for news, legal sources, and business. Includes national and regional newspapers, wire services, broadcast transcripts, international news, and non-English language sources, etc