See the W&L library's guide to information from U.S. State and Local Governments sources.
This is almost certainly the most comprehensive database of Congressional publications, some dating back as far as the late 1700's. Includes the complete texts of hearings and most other documents. An interesting sub-set of the database provides legislative histories. (Law Library subscription.)
Contains references to tens of thousands of data sources from the U.S. Federal Government, U.S. state governments, international intergovernmental organizations, and private sector groups, such as trade and professional associations.
Social Explorer is an online research tool designed to provide quick and easy access to current and historical census data and demographic information. The easy-to-use web interface lets users create maps and reports to better illustrate, analyze and understand demography and social change.
Statista is one of the worldâs largest statistics portals, providing data compiled from 18,000 private and public sources aggregated from North American, Europe, and Asia. All statistics and forecasts can be directly downloaded in PNG/PDF, Excel, and PowerPoint formats.
This section consists of various organizations that track political advertising spending by candidates.