The ANES produces high quality data from its own surveys on voting, public opinion, and political participation. ANES is a collaboration of Stanford University and the University of Michigan, with funding by the National Science Foundation.
Published reports filed by Senate, House of Representatives and Presidential campaigns that list how much each campaign has raised and spent. Includes lists of all donors over $200, along with each donor's home address, employer and job title.
Since 1920, the Clerk of the House has collected and published the official vote counts for federal elections from the official sources among the various states and territories. These documents, out of print for many years, have been collected and scanned in a format to make them once again available to researchers and students.
The Policy Agendas Project collects and organizes data from various archived sources to trace changes in the national policy agenda and public policy outcomes since the Second World War. Data sets include federal legislative, executive, and Supreme Court activity, as well as public opinion, media, and budgets.
The Polity IV Project continues the Polity research tradition of coding authority characteristics of states in the world system for purposes of comparative, quantitative analysis. The Polity IV dataset covers all major, independent states in the global system over the period 1800-2013
WVS is an opinion survey similar to the GSS in questions and topics addressed, but includes representative samples from about 90 countries ranging from post-industrial democracies to developing nations.
Elections results from presidential elections, 1789-2012. Granularity of data varies considerably over time and by state.
Also see campaign documents and press releases from the primaries and general election.