American Politics

Provides real-time data on roll call votes, members' of Congress voting histories and their ideology (using NOMINATE scores, a way of spatially measuring ideology on a liberal-conservative economic axis and on a salient "issues of the day" axis), and party ideology scores for each individual Congress back to 1789. Also has a searchable interface and many visualization options. Data in csv and JSON formats; also accessible via the Rvoteview package.

Ornstein and Mann's classic print volume will now only be online. Tables cover member demographics, congressional elections, campaign finance, committees, staff and operating expenses, workload and productivity, action on the federal budget, polarization and voting alignments. Data in Excel format; dates vary, but generally 1950-present.

Compiles information at the level of the individual legislator on biography, party membership, elections, and committee membership. Legislative data include roll call votes for each member, roll calls coded by issue, roll call text, presidential requests for legislative action and roll calls held in response. Data in delimited, STATA, SPSS, and SAS formats. 1789-1989.

Project coding various documents and data according to a detailed topical classification scheme to enable an analysis of policymaking activities across time. Coded series include Congressional hearings, public laws, roll call votes, Congressional Quarterly articles, budget authority, Presidential State of the Union speeches, Executive Orders, Supreme Court cases, a sample of New York Times articles, and Gallup’s Most Important Problem public opinion series. Data in .csv; 1945-2013.

Provides information about more than 400,000 bills introduced in the U.S. Congress along with extensive information about each bill's progress and sponsor. The bills database uses Poole and Rosenthal's ICPSR member IDs to incorporate biographical and institutional position information about each bill's sponsor. Also classifies each bill's title according to the topic coding system of the Policy Agendas Project. Each bill is designated to be primarily about one major topic and one subtopic. Data in .tsv format; 1947-present.

Roll call votes from the House (83rd Congress/1953-present) and Senate (91st Congress/1969-present) utilizing an extensive coding for procedural vote type, party unity, Southern/Northern coalitions, presidential position. Also includes Policy Agenda codes.

Dataset estimating the legislative significance of all enacted public laws from 1877-1994 (more than 37,000). Significance is determined by using the ratings of both contemporaneous and retrospective sources. Each law includes Congress number and session, date of passage, public law number, bill number, originating committee, description, and page length. See Clinton and Lapinski (2006). “Measuring Legislative Accomplishment, 1877-1994,” American Journal of Political Science 50(1):232-49.

This dataset contains metadata for every bill introduced, including sponsors, cosponsors, committee actions, floor votes and a summary, along with the data of the last modification to the bill. Data in XML from 93rd Congress (1973) to present.

Official GPO bulk data repository for Congressional bill text and status from the 113th Congress (2013-2014) to present. Data can be retrieved in either XML or JSON formats.

Nonprofit dedicated to tracking legislation and legislators in the US. Pulls in bills and resolution data and text from THOMAS and GPO (103rd Congress/1993-present; selected historical data), provides voting records of representatives and senators back to 1789 (THOMAS for recent and VOTEVIEW data for older votes), and biographical (1789-present) and committee data (93rd Congress/1973-present) from various sources.

Bulk download of bills and legislative tracking information for Congress and the 50 states. Requires free registration. Downloads in JSON, XML, and CSV. Generally, late 2000s-present.

Provides 1-2 page summary statistics of the legislative activity of each Congress back to the 80th (1947-48). Each contains things like how many measures were introduced, reported, passed, and enacted into law; how many votes and which kinds; and how many nominations were confirmed or unconfirmed.

Interactive visualization for exploring patterns of lawmaking in Congress from the 93rd Congress (1973)- 114th Congress (2015-16). Includes information about the legislative histories, topics and sponsors of more than 250,000 bills and resolutions. Can be filtered by individual member, by party, by topic, and more. Bulk data downloads available.

Measures the political liberalism/conservatism of states, congressional districts, state senate and assembly districts, and cities using responses to survey questions by 275,000 Americans who participated in the Annenberg National Election Study and the Cooperative Congressional Election Study from 2000 to 2011. Data is coded using district boundaries from both before and after the 2010 Census redistricting. Data in .csv format.

Daily updating of CQ's Presidential Support, Party Unity, and Voting Participation scores. This used to be only released annually. They also have scores for 2000-present on the site. Note: you must first log in to our CQ.com subscription, then click the link above to access. For trend tables for presidential victories by chamber and Congressional support by party, 1954-2014, see Tables 6-7 and 6-8 in Vital Statistics on American Politics.

George C. Edwards, III (TAMU) calculates four indexes of presidential support based on roll call votes in Congress: overall support, nonunanimous support, single-issue vote support, and CQ Key Vote support. Support scores by member of Congress as well as yearly averages. Data in .txt and Excel formats; 1953-2015.

Presidential Support Tables listed yearly in the CQ Almanac. Lists all the roll calls on which the president took a stand and how members of Congress voted relative to his position. PDF tables and analysis; 1953+.

Issued biennially, the Almanac provides in-depth analysis and comprehensive profiles of every congressional district, state, governor and member of Congress. Previous years are in print at JK1012 .A44 (Firestone) back to 1972.

Biennial reference on with detailed bios on each Member and congressional district. Online back to 2006; in print at JK1010 .P64 (Firestone) back to 1982.

Contains "variables describing congressional service and selected biographical characteristics for each person who has served in the United States Congress" through the 104th Congress. The congressional service variables "include political party affiliation, district, state and region represented, and exact and cumulative dates of service in each Congress and each chamber, as well as total congressional service. The biographical variables cover state and region of birth, education, military service, occupation, other political offices held, relatives who also have held congressional office, reason for leaving each Congress, and occupation and political offices held subsequent to service in Congress."

Biographical directory of all members of Congress from 1774 to present. Can search by name, position, state, party, year, or Congress number. For bulk download of data, see Govtrack's github page. 1774-present.

District expert survey of the 2006 and 2010 congressional elections, conducted in a random sample of U.S. House districts. National convention delegates and state legislators in both political parties were surveyed as expert informants and were asked to place each candidate running in their district on a liberal-conservative scale and on several issue items; to rate each candidate on items designed to assess skills, traits, and attributes as candidates and as office holders; and to report on various aspects of the tone, emphasis, and conduct of the House campaign in their district. Data from individual experts are available, as are data on various candidate- and district-level indicators constructed from the informant responses.

Compiled by the House Clerk, various tables about women in Congress. Includes a full list of all female representatives and senators by Congress and by state; committee assignments (by committee); female committee chairs; women of color; and more. 1917-present.

Compiled by the House Clerk, various tables about Black Americans in Congress. Includes a full list of all Black Representatives and Senators by Congress and by state; committee assignments (by committee); committee chairs; Black Caucus leaders, and more. 1870-present.

Datasets recording Congressional committee membership 1st–114th Congress (1789-2016) by Charles Stewart of MIT.

Congressional Research Service report with tables on requested and authorized budgets by committee in the House since 1995.

CRS report showing staffing levels by committee in the House, 1977–present.

CRS report with tables showing staffing levels by committee in the Senate, 1977–present.

Data on the committee preferences of 1,163 first term members (655 Democrats, 452 Republicans) and committee transfer requests made by 1,317 incumbents (711 Democrats, 662 Republicans), 1947–1995.

"The data set includes a wide range of economic, social and geographic information for every U.S. congressional district. The variables range from such basic information as size of each district (in square miles), the population, and the number unemployed (at the time of each census) to much more specialized information like the number of beds in VA hospitals in the district or whether the district is coastal." Compiled by Scott Adler. Data available in .csv for each Congress.

Contains a wide range of demographic and political variables for congressional districts of the 87th-104th Congresses. Used in David Lublin's book, The paradox of representation: racial gerrymandering and minority interests in Congress. Data in .csv and tabular format.

Digital boundary definitions for every U.S. Congressional District in use between 1789 and 2012 provided by scholars at UCLA. Boundaries available as shapefiles or GeoJSON definitions. Includes extensive documentation of how boundaries for districts were constructed. For 2016 CD boundaries, see the United States Districts project.

Official publication site of the Government Publishing Office. In addition to Congressional documents, this site houses official publications from across the federal government. Also includes some bulk material under the Developers tab.

The Library of Congress's official site for current legislative information. Provides the full text of House and Senate bills, bill summary and status reports, public laws, roll call votes, the Congressional Record, Congressional committee reports, presidential nominations, and treaty documents. Replaced the former THOMAS system. 93rd Congress/1973+.

Contains text from the bound and daily editions of the United States Congressional Record that has been OCR-ed and parsed into speeches and bigrams with speaker and session metadata. Covers the 43rd to 114th Congress (1873-2017). Also includes a list of phrases manually classified into topics.

OCR text of the Congressional Globe (1833-1873, predecessor of the Congressional Record) processed by Mark Phillips, University of North Texas Libraries, using the image files from the Library of Congress's Century of Lawmaking collection. No additional post-processing has been done and the OCR is of varying quality. 1 tar file; 112 volumes, 104,615 pages of OCR text.

Bulk download of House of Representatives Committee Hearing videos and transcripts. Most are from the Oversight Committee, but other committees are also represented. 100th-112th Congresses (1987-2012).

CLA preserves and makes available to researchers the historical records of the U.S. House of Representatives and the U.S. Senate. Provides finding aids to House and Senate collections as well as additional resources.