Rich site, from the University of Virginia's Miller Center of Public Affairs, has a wealth of primary sources including public papers, party platforms (from 1840-present) , speeches, video, and audio.

Provides biographical sketches and years in Congress. Searches are by name, position, state, party, year or Congressional session.

The site proclaims "Your Guide to the Money in US Elections." Detailed and virtually complete guide to campaign finance in the United States. Information about donations to campaigns at every level (local,state, and national) and from every source (individual to PAC). Created and supported by the Center for Responsive Politics, a respected political watchdog group.

The Database contains over two hundred pieces of information about each case decided by the Court between the 1953 and 2016 terms. Examples include the identity of the court whose decision the Supreme Court reviewed, the parties to the suit, the legal provisions considered in the case, and the votes of the Justices.

Access to a vast amount of information from Congress, including ability to search for bills and resolutions, public laws, roll call votes, current activity in Congress, Congressional Record, legislative schedules and calendars, committee information, presidential nominations, treaties and links to other online legislative and governmental resources.

Official web site of the United States government contains links to federal, state, local and tribal political sites with a wealth of online information, services and resources.

"Oyez (pronounced OH-yay)—a free law project from Cornell’s Legal Information Institute (LII), Justia, and Chicago-Kent College of Law—is a multimedia archive devoted to making the Supreme Court of the United States accessible to everyone. It is the most complete and authoritative source for all of the Court’s audio since the installation of a recording system in October 1955. Oyez offers transcript-synchronized and searchable audio, plain-English case summaries, illustrated decision information, and full-text Supreme Court opinions (through Justia). Oyez also provides detailed information on every justice throughout the Court’s history and offers a panoramic tour of the Supreme Court building, including the chambers of several justices."

Some of your classes may require you to use American Political Science Association style in your papers.