U.S. Courts - federal courts in the U.S. includes court cases, new laws, FAQs, and job opportunities
Whitehouse - features curent event topics, presidential/vice-presidential bios, info about the federal government, archive of White House documents.
State and Local Governments - a local index of state and local governments, includes many links to related topics, also links to local.
C-span - up-to-the-minute new coverage with links to other news, Campaign 2000 coverage, and Cspan in the classroom program.

NASA - access to almost any U.S. historical document, includes a research room with database search, all federal laws, regulations in full text, original documents and posters, digital classroom link including information on National History Day.

National Archives - this database hosts a variety of American and US Government important documents.