Political Science: Law & Legal Information

Law Reviews

• ABA Law Review/Journal Search
• Law Review Commons

Legal Dictionaries and Encyclopedias

• Nolo's Free Dictionary of Law Terms and Legal Definitions
• Wex Legal Dictionary and Encyclopedia (Cornell's LII)

Legal Blogs

• SCOTUS Blog
• ABA Journal Blawgs Directory

U.S. Code

• Cornell's Legal Information Institute
• U.S. Government Publishing Office U.S Code

Regulations

• Cornell's Legal Information Institute Federal Regulations
• U.S. Government Publish Office Federal Regulations

Case Law

• Justia - U.S. Supreme Court
• Justia - U.S. Federal Courts of Appeals
• Public Library of Law

State resources

• State or agency websites (varies)
• Court websites (varies) 
• Massachusetts State Legislature
• Law by Source: State (Cornell's LII)
• Library of Congress Guide to Law Online: U.S. States and Territories