Methodology & How to Cite
Our sources, our standard, and what we can and can’t yet promise.
PolitiFinder compiles more than two centuries of U.S. election results into one consistent, nonpartisan record. We lead with the popular vote because it’s the most comparable figure across eras and offices, and we link a person’s whole career together: every contest, every opponent, every vote, across the offices they ran for. This page explains exactly how, so you can judge the data and cite it with confidence.
How to cite PolitiFinder
Please credit PolitiFinder and link back. Every profile, race, and ranking has a clean, permanent URL. The full suggested citation, with the work, publisher, and the dataset’s DOI:
PolitiFinder (137 Finder LLC). U.S. Election Records. politifinder.com, DOI 10.5281/zenodo.20768539. Accessed [date].
For a specific page, name it and link straight to it. For example: PolitiFinder, “Benjamin Harrison: election history & vote totals,” https://politifinder.com/p/benjamin-harrison. Accessed [date]. For formal work, please verify the specific figure against the primary source we list.
Our sourcing standard
The governing rule is a two-era split. From 1976 on we use official certified totals (the FEC and the Clerk of the House), which are more authoritative than any secondary compilation. For earlier years we use official returns as recorded by the Clerk of the House and archived by ICPSR. By office:
- President. Popular votes from official certified totals (1976–2024) and, for earlier years, official returns archived by ICPSR and the founding-era A New Nation Votes (American Antiquarian Society & Tufts), reconciled against official state canvasses. Electoral votes from the National Archives for all years.
- U.S. Senate & House (1976+). The MIT Election Data and Science Lab (MEDSL): President 1976–2020, Senate 1976–2020, and House 1976–2022 on Harvard Dataverse, with 2024 from official certified state results.
- Historical Senate (1914–1975) & House. The Constituency-Level Elections Archive (CLEA) at the University of Michigan, which is candidate-complete and official-canvass-sourced.
- Governor. Official state canvasses published by state Secretaries of State and boards of elections. Where sources differ we use the certified figure.
- Biographies & portraits. Wikidata (birth and death dates, images) and the Congressional Bioguide (service records, identity).
Entity resolution, and why our totals are different
The hard part of an election database isn’t the votes. It’s deciding which votes belong to the same person. A career “total popular votes” figure only means something if every race a person ran is gathered onto exactly one profile, across the House, the Senate, a governorship, and the White House, and across a century of spelling and suffix variations, with no one else’s race counted by mistake.
We do that by keying identity to the Congressional Bioguide ID wherever a person actually served, and falling back to hand-verified matching for everyone else. A shared surname is never sufficient on its own. That’s why John Neely Kennedy of Louisiana is not John F. Kennedy, Elizabeth Warren is not Earl Warren, and Harry F. Byrd Sr. and Jr., or the two Robert Tafts, each keep their own record. Only a database resolved this carefully can honestly add up a 217-million-vote career (Joe Biden, across his VP and presidential runs) or the combined vote total of an entire political dynasty, numbers you won’t find compiled anywhere else.
Coverage & limitations
We’d rather show a gap than a guess. The honest caveats:
- Verify before citing. Figures are reconciled across sources, but for formal work you should confirm a specific number against the primary source.
- The popular-vote era is the limiting principle. Pre-1824 presidential elections have no popular vote (electors were chosen by state legislatures), and the 1824 count is partial. The Senate begins in 1914, when the 17th Amendment moved it to the popular vote.
- Running mates inherit the ticket’s totals. A ballot for “Biden/Harris” is a vote for both, so each running mate carries the ticket’s popular and electoral votes. Every such race is labeled by role so the shared number is never mistaken for a separate count.
- Losing challengers are often sparse. Candidates who never held office frequently have no authoritative birth date or portrait source, so we leave those fields blank rather than risk stamping the wrong person’s details.
- A known tail. A small number of pre-1900 governor-only profiles can still fuse same-name people who lack any Bioguide ID. It’s a flagged, low-priority cleanup, not a systemic error.
The full, dated provenance, including every reconciled year and special case, is maintained alongside the data. The short version lives on our data & sources page.
How the data is kept current
Coverage runs through the 2024 federal elections and the 2025 governor races. The site is deliberately static between updates: figures change only when we reload a dataset and redeploy, which keeps every cited number stable and reproducible. Each page carries the date its data was last verified, July 5, 2026 as of this build, and corrections are issued on an ongoing basis; see our data & sources page.
Quotable, link-worthy assets
Built to be referenced. Each links straight to the underlying contests:
- Political families & dynasties: combined career popular votes across a family’s members, a stat only an entity-resolved database can compute.
- Records & rankings: biggest landslides, closest races, career popular-vote leaders, and the presidents who won while losing the popular vote.
- Most career popular votes of all time. The headline metric most sites skip.
Frequently asked questions
Where does PolitiFinder get its election data?
Presidential popular votes come from official certified totals (the FEC and the Clerk of the U.S. House) from 1976 on, and from official returns archived by ICPSR (and, for the founding era, A New Nation Votes) for earlier years; electoral votes come from the National Archives. U.S. Senate and House results from 1976 forward come from the MIT Election Data and Science Lab. The earlier Senate (1914 to 1975) and historical House come from the Constituency-Level Elections Archive (CLEA). Governor totals are compiled from official state canvasses published by the states. Biographical details and portraits come from Wikidata and the Congressional Bioguide.
How does PolitiFinder calculate career total popular votes?
We add up every vote a person received across every general election they ran in, for president, U.S. Senate, governor, or the U.S. House, and tie those races to one profile. Because the same person is resolved to a single record across offices and eras, someone who served in more than one role (a senator who became president, a representative who became a governor) shows one combined lifetime total instead of several scattered ones.
How do you keep politicians with the same name apart?
Identity is keyed to the Congressional Bioguide ID wherever a person actually served, so a father and son are never merged. Harry F. Byrd Sr. and Jr. stay separate, as do the two Robert Tafts and the two Warners. A shared surname is never enough on its own, and every cross-office merge is hand-verified. That discipline is what keeps the career totals, and the combined family totals, accurate.
Can I cite PolitiFinder in research, journalism, or on Wikipedia?
Yes. PolitiFinder is a nonpartisan database built to be quoted, and every profile, race, and ranking has a permanent URL. For formal work, please verify the specific figure against the primary source we list. A suggested citation: “politifinder.com, accessed [date].”
How current is the data, and how often is it updated?
Coverage runs through the 2024 federal elections and the 2025 governor races. The site is static between updates: numbers change only when we reload a dataset and redeploy, and each page shows the date its data was last verified. Corrections are issued on an ongoing basis under our data-accuracy policy.