Free online encyclopedia, started in 2007 & continually updated, covering all aspects of US politics. Aims for content to be neutral, objective and verifiable

cable TV project to provide free access to Congressional debates (some back to 1983) & other video content on US government, including presidential debates

See also: Congress.gov; Congressional Research Service; C-Span Video Library; GovTrack

Official website for US federal legislative information, maintained by the Library of Congress (replaces Thomas)

Official Congress website for non-confidential CRS reports, an extremely useful source of information for US politics. Mostly recent, but older reports are being archived.
See: African-American members of the US Congress, 1870-2020 https://crsreports.congress.gov/product/pdf/RL/RL30378

Portal, curated by Stanford University, aims to facilitate more comprehensive access to CRS reports

Effort by the Internet Archive to pull together government documents from Canada & the US. Currently over 500 000 from national & state organisations

Official portal to US government publications (replaces FD Sys & GPO Access). Freely accessible from about 1993 onwards, including Presidential documents, Congressional bills, documents, hearings & reports, the Congressional record, and Federal register. Provides access to Statutes at Large 1789- . Also:
MetaLib from GPO - searches across official databases for reports, articles & citations, with links to full text

Tracking the US Congress, including complete voting records since the 1st Congress. See also Voteview below

GPO engine that cross searches official federal databases for reports, articles and citations. Links to full text

Repository for federal documents, some available digitally

Official government portal for searching federal & state websites, including list of federal agencies.

Free site from UCLA that allows users to view every congressional roll call vote in American history on a map of the United States and on a liberal-conservative ideological map including information about the ideological positions of voting Senators and Representatives

An independent US-based body focusing on US foreign policy, and publisher of the influential journal Foreign Affairs.

Official records of the foreign policy and diplomatic history of the US from 1945 to 1988 (publication is ongoing). Older volumes are also available for the period 1861-1960 from University of Wisconsin-Madison Libraries. See also:
Secretaries of Defense historical series of freely available publications online (1947-)
United States Treaty Series - digitised multilateral & bilateral treaties 1776-1949 on Library of Congress website (and its U.S. Treaties : a beginner's guide)

Provide online access to key declassified records on issues including U.S. national security, foreign policy, diplomatic and military history, and intelligence policy.

An independent, non-partisan, national institution established and funded by Congress. Full text of many reports are available.

Part of the larger JSTOR Reveal Digital project, providing open access to rare primary source material expressing Right-wing opinions in 1960s & 1970s America

Longstanding project (1999) based at UCSB, now containing over 100 000 documents relating to the presidency.

Debates from 1976 (+1960) with transcripts. Searchable by keyword

The Library of Congress has digitised the papers of 23 Presidents, from Washington to Coolidge, spanning the years 1789-1929. For digitised papers of more recent Presidents see the National Archives (Public Papers of the Presidents)

Film archive of presidential campaign commercials, 1952-2012.

Compiled by the National Archives and Records Administration (NARA), papers from 1929 (Herbert Hoover) to 1991 (George H.W. Bush) are available digitally through GPO digitization

Major independent think tank. Full text of many reports available.

Independent, non-partisan policy institute that advocates a moderately centre-left approach

Research centre at Rutgers with dataset on women who have held office at the congressional, statewide elected executive, and state legislative levels nationwide (1893-)

Independent database aiming to reveal the links between money and politics in the US.

Website from Center for Responsive Politics, looking at connections between money & politics in the US

Respected research institute, seeking to bring academia & public policy together on questions of domestic and international interest.

Nonprofit news team focused on public interest journalism, notably databases on who donates to politicians across Canada, who lobbies them, and how the government spends taxpayers money.

Portal to resources for Canadian politics, especially official sources such as the Cabinet Conclusions database. LAC also maintains the Government of Canada web archive