RealClearPolitics is a Chicago-based political news and polling data aggregator formed in 2000 featuring selected political news stories and op-eds from various news publications, in addition to commentary from its own contributors.

"The American Enterprise Institute is a public policy think tank"

Valuable for its extensive coverage of both historical and current information on United States presidencies, the American Presidency Project provides a searchable database of over 85,000 documents, such as speeches, official papers, executive orders, proclamations, news conferences, and press briefings. Various retrieval options are available, including by keywords, dates, document type, and presidents.

The Brookings Institution is a nonprofit public policy think tank based in Washington, DC.

A project of the Annenberg Public Policy Center. Their mission statement writes: "We are a nonpartisan, nonprofit “consumer advocate” for voters that aims to reduce the level of deception and confusion in U.S. politics. We monitor the factual accuracy of what is said by major U.S. political players in the form of TV ads, debates, speeches, interviews and news releases. Our goal is to apply the best practices of both journalism and scholarship, and to increase public knowledge and understanding."

From the Tampa Bay Times, this investigative site examines the truth of the statements of politicians to separate fact from fiction.

Contains polling data collected by ABC News.

ANES is a political science survey which studies voters political behavior during each general election. It has an archive of datasets including time series data of individual responses to their surveys back to 1952. Also data from other studies that ANES has conducted over this period. This is a useful resource for scholars and students of US elections and voter opinion.

Contains Canadian commercial and independent surveys from 1973 to the present.

The CBS News Poll Database includes survey questions from national CBS News polls conducted since 1976.

For 75 years Gallup has been studying attitudes and behaviors. It reaches 160 countries with its research into a wide variety of areas such as politics, economics, well-being, trends and more. See also NexisUni for ways to research this service.

Contains polling data collected from Fox News from 2005 to the present.

This organization conducts polls on politics, the media and American perspectives. They also conduct the Pew Global Attitudes Project, "a series of worldwide public opinion surveys that encompasses a broad array of subjects ranging from people's assessments of their own lives to their views about the current state of the world and important issues of the day. More than 90,000 interviews in 50 countries have been conducted as part of the project's work."

An independent, nonpartisan resource on trends in American public opinion. Contains frequently updated polling results and data.

This for-profit polling organization conducts opinion research on both domestic and international issues. Their website offer news reports on their research findings. Zogby also works with think-tanks, universities and research groups to conduct polls.