Members of the United States Congress (1789-Present) and congressional committees (1973-Present) in YAML.
Using the data
This repository contains data about legislators...:
legislators-current.yaml: Currently serving Members of Congress (as of last update).
legislators-historical.yaml: Historical Members of Congress (i.e. all Members of Congress except those in the current file).
legislators-social-media.yaml: Current social media accounts for Members of Congress. Official accounts only (no campaign or personal accounts).
...and about committees:
committees-current.yaml: Current committees of the Congress, with subcommittees.
committee-membership-current.yaml: Current committee/subcommittee assignments as of the date of last update.
committees-historical.yaml: Current and historical committees of the Congress, with subcommittees, from the 93rd Congress (1973) and on.
This repository also contains a database of presidents and vice presidents in executive.yaml. Recall that vice presidents are also president of the Senate and cast tie-breaking votes.
The files are in YAML format. YAML is a serialization format similar in structure to JSON but typically written with one field per line. Like JSON, it allows for nested structure. Each level of nesting is indicated by indentation or a dash.
This database has been collected from a variety of sources:
- GovTrack.us (http://www.govtrack.us).
- The Congressional Biographical Directory (http://bioguide.congress.gov).
- Congressional Committees, Historical Standing Committees data set by Garrison Nelson and Charles Stewart (http://web.mit.edu/17.251/www/data_page.html).
- Martis’s “The Historical Atlas of Political Parties in the United States Congress”, via Rosenthal, Howard L., and Keith T. Poole. United States Congressional Roll Call Voting Records, 1789-1990 (http://voteview.com/dwnl.htm).
- The Sunlight Labs Congress API (http://sunlightlabs.github.com/congress/).
- The Library of Congress's THOMAS website (http://thomas.loc.gov).
- C-SPAN's Congressional Chronicle (http://www.c-spanvideo.org/congress)
The data is currently maintained both by hand and by some scripts in the
Running the scripts
You can just use the data directly without running any scripts. If you want to develop on and help maintain the data, our scripts are tested and developed on Python 3.6.
Every script in
scripts/ should be safely import-able without executing code, beyond imports themselves. We typically do this with a
def run(): declaration after the imports, and putting this at the bottom of the script:
if __name__ == '__main__': run()
Every pull request will pass submitted scripts through an import, to catch exceptions, and through pyflakes, to catch unused imports or local vars.
Legislators File Structure and Overview
legislators-historical.yaml contain biographical information on all Members of Congress that have ever served in Congress, that is, since 1789, as well as cross-walks into other databases.
Each legislator record is grouped into four guaranteed parts: id's which relate the record to other databases, name information (first, last, etc.), biographical information (birthday, gender), and terms served in Congress. A typical record looks something like this:
- id: bioguide: R000570 thomas: '01560' govtrack: 400351 opensecrets: N00004357 votesmart: 26344 fec: - H8WI01024 cspan: 57970 wikipedia: Paul Ryan ballotpedia: Paul Ryan maplight: 445 house_history: 20785 icpsr: 29939 name: first: Paul middle: D. last: Ryan bio: birthday: '1970-01-29' gender: M terms: ... - type: rep start: '2011-01-03' end: '2013-01-03' ... - type: rep start: '2013-01-03' end: '2015-01-03' state: WI party: Republican district: 1 url: http://paulryan.house.gov address: 1233 Longworth HOB; Washington DC 20515-4901 phone: 202-225-3031 fax: 202-225-3393 contact_form: http://www.house.gov/ryan/email.htm office: 1233 Longworth House Office Building
Terms correspond to elections and are listed in chronological order. If a legislator is currently serving, the current term information will always be the last one. To check if a legislator is currently serving, check that the end date on the last term is in the future.
The split between
legislators-historical.yaml is somewhat arbitrary because these files may not be updated immediately when a legislator leaves office. If it matters to you, just load both files.
A separate file
legislators-social-media.yaml stores social media account information. Its structure is similar but includes different fields.
Legislators Data Dictionary
The following fields are available in
- bioguide: The alphanumeric ID for this legislator in http://bioguide.congress.gov. Note that at one time some legislators (women who had changed their name when they got married) had two entries on the bioguide website. Only one bioguide ID is included here. This is the best field to use as a primary key.
- thomas: The numeric ID for this legislator on http://thomas.gov and http://beta.congress.gov. The ID is stored as a string with leading zeros preserved.
- lis: The alphanumeric ID for this legislator found in Senate roll call votes (http://www.senate.gov/pagelayout/legislative/a_three_sections_with_teasers/votes.htm).
- fec: A list of IDs for this legislator in Federal Election Commission data.
- govtrack: The numeric ID for this legislator on GovTrack.us (stored as an integer).
- opensecrets: The alphanumeric ID for this legislator on OpenSecrets.org.
- votesmart: The numeric ID for this legislator on VoteSmart.org (stored as an integer).
- icpsr: The numeric ID for this legislator in Keith Poole's VoteView.com website, originally based on an ID system by the Interuniversity Consortium for Political and Social Research (stored as an integer).
- cspan: The numeric ID for this legislator on C-SPAN's video website, e.g. http://www.c-spanvideo.org/person/1745 (stored as an integer).
- wikipedia: The Wikipedia page name for the person (spaces are given as spaces, not underscores).
- ballotpedia: The ballotpedia.org page name for the person (spaces are given as spaces, not underscores).
- maplight : The numeric ID for this legislator on maplight.org (stored as an integer).
- house_history: The numeric ID for this legislator on http://history.house.gov/People/Search/. The ID is present only for members who have served in the U.S. House.
- bioguide_previous: When bioguide.congress.gov mistakenly listed a legislator under multiple IDs, this field is a list of alternative IDs. (This often ocurred for women who changed their name.) The IDs in this list probably were removed from bioguide.congress.gov but might still be in use in the wild.
- first: The legislator's first name. Sometimes a first initial and period (e.g. in W. Todd Akin), in which case it is suggested to not use the first name for display purposes.
- middle: The legislator's middle name or middle initial (with period).
- last: The legislator's last name. Many last names include non-ASCII characters. When building search systems, it is advised to index both the raw value as well as a value with extended characters replaced with their ASCII equivalents (in Python that's: u"".join(c for c in unicodedata.normalize('NFKD', lastname) if not unicodedata.combining(c))).
- suffix: A suffix on the legislator's name, such as "Jr." or "III".
- nickname: The legislator's nick name when used as a common alternative to his first name.
- official_full: The full name of the legislator according to the House or Senate (usually first, middle initial, nickname, last, and suffix). Present for those serving on 2012-10-30 and later.
other_names, when present, lists other names the legislator has gone by officially. This is helpful in cases where a legislator's legal name has changed. These listings will only include the name attributes which differ from the current name, and a start or end date where applicable. Where multiple names exist, other names are listed chronologically by end date. An excerpted example:
last: Bono Mack
- last: Bono end: '2007-12-17' ...
- id: bioguide: B001228 thomas: '01465' govtrack: 400039 opensecrets: N00007068 name: first: Mary middle: Whitaker last: Bono Mack other_names:
- birthday: The legislator's birthday, in YYYY-MM-DD format.
- gender: The legislator's gender, either "M" or "F". (In historical data, we've worked backwards from history.house.gov's Women in Congress feature.)
- religion: The legislator's religion.
terms (one entry for each election)
- type: The type of the term. Either "sen" for senators or "rep" for representatives and delegates to the House.
- start: The date legislative service began: the date the legislator was sworn in, if known, or else the beginning of the legislator's term. Since 1935 regularly elected terms begin on January 3 at noon on odd-numbered years, but when Congress does not first meet on January 3, term start dates might reflect that swearing-in occurred on a later date. (Prior to 1935, terms began on March 4 of odd-numbered years, see here.) Formatted as YYYY-MM-DD.
- end: The date the term ended (because the Congress ended or the legislator died or resigned, etc.). End dates follow the Constitutional end of a term. Since 1935, terms begin and end on January 3 at noon in odd-numbered years, and thus a term end date may also be a term start date. Prior to 1935, terms began on March 4 and ended either on March 3 or March 4. The end date is the last date on which the legislator served this term. Unlike the start date, whether Congress was in session or not does not affect the value of this field.
- state: The two-letter, uppercase USPS abbreviation for the state that the legislator is serving from. See below.
- district: For representatives, the district number they are serving from. At-large districts are district 0. In historical data, unknown district numbers are recorded as -1.
- class: For senators, their election class (1, 2, or 3). Note that this is unrelated to seniority.
- state_rank: For senators, whether they are the "junior" or "senior" senator (only valid if the term is current, otherwise the senator's rank at the time the term ended).
- party: The political party of the legislator. If the legislator changed parties, this is the most recent party held during the term and
party_affiliationswill be set. Values are typically "Democrat", "Independent", or "Republican". The value typically matches the political party of the legislator on the ballot in his or her last election, although for state affiliate parties such as "Democratic Farmer Labor" we will use the national party name ("Democrat") instead to keep the values of this field normalized.
- caucus: For independents, the party that the legislator caucuses with, using the same values as the
partyfield. Omitted if the legislator caucuses with the party indicated in the party field. When in doubt about the difference between the
partyfield is what displays after the legislator's name (i.e. "(D)") but the
caucusfield is what normally determines committee seniority. This field was added starting with terms for the 113th Congress.
- party_affiliations: This field is present if the legislator changed party or caucus affiliation during the term. The value is a list of time periods, with
enddates, each of which has a
partyfield and a
caucusfield if applicable, with the same meanings as the main
caucusfields. The time periods cover the entire term, so the first
startwill match the term
start, the last
endwill match the term
end, and the last
caucusif present) will match the term
- url: The official website URL of the legislator (only valid if the term is current).
- address: The mailing address of the legislator's Washington, D.C. office (only valid if the term is current, otherwise the last known address).
- phone: The phone number of the legislator's Washington, D.C. office (only valid if the term is current, otherwise the last known number).
- fax: The fax number of the legislator's Washington, D.C. office (only valid if the term is current, otherwise the last known number).
- contact_form: The website URL of the contact page on the legislator's official website (only valid if the term is current, otherwise the last known URL).
- office: Similar to the address field, this is just the room and building number, suitable for display (only valid if the term is current, otherwise the last known office).
- rss_url The URL to the official website's RSS feed (only valid if the term is current, otherwise the last known URL).
leadership_roles: - title: Minority Leader chamber: senate start: '2007-01-04' end: '2009-01-06'
For members with top formal positions of leadership in each party in each chamber, a
leadership_roles field will include an array of start/end dates and titles documenting when they held this role.
Leadership terms are not identical to legislative terms, and so start and end dates will be different than legislative term dates. However, leaders do need to be re-elected each legislative term, so their leadership terms should all be subsets of their legislative terms.
Except where noted, fields are omitted when their value is empty or unknown. Any field may be unknown.
Notes: In most cases, a legislator has a single term on any given date. In some cases a legislator resigned from one chamber and was sworn in in the other chamber on the same day. Terms for senators list each six-year term, so the terms span three Congresses. For representatives and delegates, each two-year term is listed, each corresponding to a single Congress. But Puerto Rico's Resident Commissioner serves four-year terms, and so the Resident Commissioner will have a single term covering two Congresses (this has not been updated in historical data).
Historically, some states sending at-large representatives actually sent multiple at-large representatives. Thus, state and district may not be a unique key.
Data on Official Social Media Accounts
This dataset is designed to include accounts that are paid for with public funds and which represent official communications of their office. We rely on reasonable verification from the legislative office about the status of their accounts.
Offices are supposed to maintain strict separation of official funds and campaign funds, and official funds are not supposed to be used to further things like re-election efforts.
In practice, a campaign account may often look similar to an official account in terms of content, especially when expressing views on issues and legislations. However, there will be differences in what's appropriate for each account, and they will likely be maintained by different staff employed by different organizations.
The social media file
legislators-social-media.yaml stores current social media account information.
Each record has two sections:
id section identifies the legislator using bioguide, thomas, and govtrack IDs (where available). The
social section has social media account identifiers:
- twitter: The current official Twitter handle of the legislator.
- youtube: The current official YouTube username of the legislator.
- youtube_id: The current official YouTube channel ID of the legislator.
- instagram: The current official Instagram handle of the legislator.
- instagram_id: The numeric ID of the current official Instagram handle of the legislator.
- facebook: The username of the current official Facebook presence of the legislator.
Several legislators do not have an assigned YouTube username. In these cases, only the youtube_id field is populated.
All values can be turned into URLs by preceding them with the domain name of the service in question (and in the case of YouTube channels, the path
Legislators are only present when they have one or more social media accounts known. Fields are omitted when the account is unknown.
Updating social media accounts
Available tasks with
--sweep: Given a
--service, looks through current members for those missing an account on that service, and checks that member's official website's source code for mentions of that service. Uses a CSV at
data/social_media_blacklist.csvto exclude known non-individual account names. A CSV of "leads" is produced for manual review.
--update: Given a
--service, reads the CSV produced by --sweep back in and updates the YAML accordingly. Note: With small updates, for people already in the YAML, it's easiest to just update by hand.
--clean: Given a
--service, removes legislators from the social media file who are no longer current.
--resolvefb: Uses Facebook usernames to look up graph IDs, and updates the YAML accordingly.
--resolveytUses YouTube usernames to look up any channel IDs, and updates the YAML accordingly.
--resolveigUses Instagram user IDs to look up any usernames, and updates the YAML accordingly.
Options used with the above tasks:
--service: Can be "twitter", "youtube", or "facebook".
--bioguide: Limit activity to a single member, by bioguide ID.
--sweep, send an email if there are any new leads, using settings in scripts/email/config.yml (if it was created and filled out).
Committees Data Dictionary
committees-current.yaml file lists all current House, Senate, and Joint committees of the United States Congress. It includes metadata and cross-walks into other databases of committee information. It is based on data scraped from House.gov and Senate.gov.
committees-historical.yaml file is a possibly partial list of current and historical committees and subcommittees referred to in the unitedstates/congress project bill data, as scraped from THOMAS.gov. Only committees/subcommmittees that have had bills referred to them are included.
The basic structure of a committee entry looks like the following:
- type: house name: House Committee on Agriculture url: http://agriculture.house.gov/ thomas_id: HSAG house_committee_id: AG jurisdiction: The U.S. House Committee on Agriculture, or Agriculture Committee, is a standing committee of the ... jurisdiction_source: http://en.wikipedia.org/wiki/House_Committee_on_Agriculture subcommittees: (... subcommittee list ...)
The two files are structured each as a list of committees, each entry an associative array of key/value pairs of committee metadata.
The fields available in both files are as follows:
- type: 'house', 'senate', or 'joint' indicating the type of commmittee
- name: The current (or most recent) official name of the committee.
- thomas_id: The four-letter code used for the committee on the THOMAS advanced search page.
- senate_committee_id: For Senate and Joint committees, the four-letter code used on http://www.senate.gov/pagelayout/committees/b_three_sections_with_teasers/membership.htm. Currently the same as the thomas_id.
- house_committee_id: For House committees, the two-letter code used on http://clerk.house.gov/committee_info/index.aspx. Currently always the same as the last two letters of the thomas_id.
- jurisdiction: The committee's jurisdiction.
- jurisdiction_source: The source for the jurisdiction text.
- subcommittees: A list of subcommittees, with the following fields:
- name: The name of the subcommittee, excluding "Subcommittee on" that appears at the start of most subcommittee names. Some subcommittee names begin with a lowercase "the" so bear that in mind during display.
- thomas_id: The two-digit (zero-padded) code for the subcommittee as it appeared on THOMAS, and likely also the same code used on the House and Senate websites.
Additional fields are present on current committee entries (that is, in
- url: The current website URL of the committee.
- address: The mailing address for the committee.
- phone: The phone number of the committee.
- rss_url: The URL for the committee's RSS feed.
- minority_rss_url: The URL for the committee's minority party website's RSS feed.
Two additional fields are present on committees and subcommmittees in the
- congresses: A list of Congress numbers in which this committee appears on the THOMAS advanced search page. It is roughly an indication of the time period during which the committee was in use. However, if a committee was not referred any bills it may not appear on THOMAS's list and therefore would not appear here.
- names: A list of past names for the committee. This is an associative array from a Congress number to the name of the committee. The name is that given on the THOMAS advanced search page for previous Congresses and does not always exactly match the official names of commmittees.
Committee Membership Data Dictionary
committee-membership-current.yaml file contains current committee assignments, as of the date of the last update of this file. The file is structured as a mapping from committee IDs to a list of committee members. The basic structure looks like this:
HSAG: - name: Frank D. Lucas party: majority rank: 1 title: Chair bioguide: L000491 thomas: '00711' - name: Bob Goodlatte party: majority rank: 2 (...snip...) HSAG03: - name: Jean Schmidt party: majority rank: 1 title: Chair
The committee IDs in this file are the thomas_id's from the
committees-current.yaml file, or for subcommittees the concatentation of the thomas_id of the parent committee and the thomas_id of the subcommittee.
Each committee/subcommittee entry is a list containing the members of the committee. Each member has the following fields:
- name: The name of the Member of Congress. This field is intended for debugging. Instead, use the id fields.
- Some of the id fields used in the legislators YAML files, such as bioguide and thomas.
- party: Either "majority" or "minority." Committee work is divided strictly by party.
- rank: The apparent rank of the member on the committee, within his or her party. This is based on the order of names on the House/Senate committee membership pages. Rank 1 is always for the committee chair or ranking member (the most senior minority party member). The rank is essentially approximate, because the House/Senate pages don't necessarily make a committment that the order on the page precisely indicates actual rank (if such a concept even applies). But if you want to preserve the order as displayed by the House and Senate, you can use this attribute.
- title: The title of the member on the committee, e.g. Chair, Ranking Member, or Ex Officio. This field is not normalized, however, so be prepared to accept any string.
- chamber: For joint committees only, the chamber that the representative is serving in, either
The Executive Branch
Because of their role in the legislative process, we also include a file
executive.yaml which contains terms served by U.S. presidents (who signed legislation) and U.S. vice presidents (who are nominally the president of the Senate and occassionally cast tie-breaking votes there).
This file has a similar structure as the legislator files. The file contains a list, where each entry is a person. Each entry is a dict with id, name, bio, and terms fields.
The id, bio, and name fields are the same as those listed above. Except:
- icpsr_prez: The numeric ICPSR identifier used in voteview.com historical roll call data when indicating the position of the President on a roll call vote. If the person also served in Congress, he or she will also have a regular icpsr ID with a different value.
Each term has the following fields:
- type: either "prez" (a presidential term) or "viceprez" (a vice presidential term).
- start: The start date of the term. In modern times, typically January 20 following an election year.
- end: The end date of the term. In modern times, typically January 20 following an election year.
- party: The political party from which the person was elected.
- how: How the term came to be, either "election" (the normal case), "succession" (presidential succession), or "appointment" (the appointment by the president of a new vice president).
Presidents and vice presidents that previously served in Congress will also be listed in one of the legislator files, but their Congressional terms will only appear in the legislator files and their executive-branch terms will only appear in
Although you can find the USPS abbreviations for the 50 states anywhere, non-voting delegates from territories --- including historical territories that no longer exist --- are included in this database. Here is a complete list of abbreviations:
The 50 States:
AK Alaska AL Alabama AR Arkansas AZ Arizona CA California CO Colorado CT Connecticut DE Delaware FL Florida GA Georgia HI Hawaii IA Iowa ID Idaho IL Illinois IN Indiana KS Kansas KY Kentucky LA Louisiana MA Massachusetts MD Maryland ME Maine MI Michigan MN Minnesota MO Missouri MS Mississippi MT Montana NC North Carolina ND North Dakota NE Nebraska NH New Hampshire NJ New Jersey NM New Mexico NV Nevada NY New York OH Ohio OK Oklahoma OR Oregon PA Pennsylvania RI Rhode Island SC South Carolina SD South Dakota TN Tennessee TX Texas UT Utah VA Virginia VT Vermont WA Washington WI Wisconsin WV West Virginia WY Wyoming
Legislators serving in the House from these territories are called delegates, except for the so-called "Resident Commissioner" from Puerto Rico.
AS American Samoa DC District of Columbia GU Guam MP Northern Mariana Islands PR Puerto Rico VI Virgin Islands
These territories no longer exist.
DK Dakota Territory OL Territory of Orleans PI Philippines Territory/Commonwealth
(Recommended) First, create a virtualenv in the scripts directory:
cd scripts virtualenv virt source virt/bin/activate
Install the requirements:
pip install -r requirements.txt
Try updating the House members contact information (mailing address, etc.):
Check whether and how the data has changed:
git diff ../*.yaml
We run the following scripts periodically to scrape for new information and keep the data files up to date. The scripts do not take any command-line arguments.
house_contacts.py: Updates House members' contact information (address, office, and phone fields on their current term, and their official_full name field)
house_websites.py: Updates House members' current website URLs.
senate_contacts.py: Updates senator information (party, class, state_rank, address, office, phone, and contact_form fields on their current term, and their official_full name, bioguide ID, and lis ID fields)
committees-current.yaml(name, address, and phone fields for House committees; name and url fields for Senate committees; creates new subcommittees when found with name and thomas_id fields) and writes out a whole new
committee-membership-current.yamlfile by scraping the House and Senate websites.
committees-historical.yamlbased on the committees listed on THOMAS.gov, which are committees to which bills have been referred since the 103rd Congress (1973).
social_media.py: Generates leads for Twitter, YouTube, and Facebook accounts for members of Congress by scraping their official websites. Uses a blacklist CSV and a whitelist CSV to manage false positives and negatives.
influence_ids.py: Grabs updated FEC and OpenSecrets IDs from the Influence Explorer API. Will only work for members with a Bioguide ID.
The following script takes one required command line argument
icpsr_ids.py: Updates ICPSR ID's for all members of the House and Senate in a given congress, based on roll call vote data files stored by Voteview.com. The script takes one command line argument: --congress=congress_number where congress_number is the number of the Congress to be updated. As of July, 2013, the permanent URL for future roll call data is unclear, and as such, the script may need to be modified when it is run for the 114th congress.
The following script may be run to create alternatly formatted data files. It takes no command-line arguments.
alternate_bulk_formats.py: creates four files (two each for current and historical legislators) in CSV formats. The CSV files do not include all fields from the legislator YAML files, and do include data from the social media YAML. All four files are stored in the
For each YAML file, there is a matching JSON file in the
alternate_formats/ directory, that should remain up to date automatically when the YAML file is updated through scripts. If you hand edit a YAML file, run
generate_json.py to update these JSON files before filing a pull request (if you don't, the Travis tests will fail and the maintainers will ask you to do so anyway).
ballotpedia field has been created using code from James Michael DuPont, using the code in email@example.com:h4ck3rm1k3/rootstrikers-wikipedia.git in the branch
- Karl Nicholas made a set of Java classes to easily filter the data.
Who's Using This Data
Ongoing projects making use of this data:
Stories written with this data:
- Margie Roswell's committee map
The project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.
All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.