Sources

Sources

Every fact on this site comes from one of these sources. Each page shows the period and release date of the sources behind it, taken from the data files, so the dates change whenever the data are refreshed.

• unitedstates/congress-legislators

  Member identity, terms, party label, contact details, district offices, social accounts, committee roles.

  Terms: public domain (CC0)

• U.S. Senate, senators contact list (senate.gov)

  Second source for senator contact details.

  Terms: U.S. government work

• U.S. Senate, roll call votes (senate.gov)

  Senate roll calls and each senator’s vote.

  Terms: U.S. government work

• Voteview (UCLA)

  Second source for roll call results and member votes, used to cross-check counts.

  Terms: see the source’s terms

• GovInfo bill status, U.S. Government Publishing Office

  Bill titles, sponsors, cosponsors and Congressional Research Service summaries.

  Terms: U.S. government work

• Federal Election Commission, candidate summaries

  Campaign finance totals as filed.

  Terms: public record

• U.S. Census Bureau, American Community Survey

  Facts about each district and state.

  Terms: U.S. government work

• unitedstates/images, official portraits from the Biographical Directory of the U.S. Congress

  Official portraits.

  Terms: public domain

Rules we follow

• Official government sources come first. We do not use ratings or summaries written by advocacy groups, news outlets or think tanks.
• Where two sources list the same fact, we keep both values and show whether they match.
• Names, party labels and committee roles are shown exactly as the source gives them.
• A fact a source does not carry is left out. We do not estimate it.
• Bill summaries are the ones written by the Congressional Research Service, a U.S. government agency, and are linked to the official bill page.
• Contributions by industry or sector are not shown, because that classification is not licensed for reuse.

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