Sources & data attribution

Race calendars, poll tables, candidate lists, historical outcomes, endorsements, ballot measures, voter registration overview tables, Cook PVI by district, AAPOR Transparency Initiative member list, external race ratings (Cook / Sabato / Inside Elections / DDHQ / FiveThirtyEight / Elections Daily / CNalysis / Split Ticket / Economist / RealClearPolitics — all sourced from per-race Predictions tables).

Per-poll citation_url links go directly to the Wikipedia article they were scraped from. Derivative content on this site is provided under the same CC BY-SA 4.0 license.

Wikipedia poll tables cite the underlying pollster reports. Each poll row on the site links to its citation URL — the original report by Cook Political Report, Marist, Siena, Quinnipiac, Pew Research, AP-NORC, Suffolk, Marquette, Fox News / Beacon Research, Emerson, Monmouth, PPP, YouGov, Echelon Insights, SurveyUSA, Mason-Dixon, Cygnal, Change Research, GSG, Public Opinion Strategies, North Star Opinion Research, RMG Research, Rasmussen Reports, and others.

Per-state Senate and Governor poll tables — complements the Wikipedia scrape for down-ballot and primary races where Wikipedia coverage is thin. Poll rows carry a 270toWin source link.

Per-race candidate rosters, photos, and short bios scraped from Ballotpedia race pages. Fills in candidate fields (and the sub-line role descriptors on race pages) where Wikipedia is incomplete, especially for House and special elections.

Daily-updated topline trackers (approval, issue questions) plus free demographic crosstabs (age, education, gender, race, party, state) from civiqs.com/results. One of the few sources combining a daily cadence with structured crosstabs.

Free no-key polls API (api.votehub.com). Bridges national approval / favorability / generic-ballot polls into the topic trackers.

Favorability trackers for US and foreign public figures (the only public source covering Putin / Zelenskyy / Netanyahu / Xi favorability), refreshed from YouGov's tracker spreadsheets in weekly waves.

Weekly topline PDFs — a recurring issue battery (approval, direction of country, policy questions) discovered via Google News RSS and parsed for the topic trackers.

Long-run indicator and trend pages (e.g. mood-of-the-nation, institutional approval). Gallup serves trends as chart images, so readings are taken from the published figures with the source news URL recorded.

Monthly Harvard CAPS–Harris topline releases — approval and salient-issue questions folded into the topic trackers.

National Marquette Law School Poll issue questions (Supreme Court approval, national issues).

Independent expenditures (Schedule E filings) and own-committee candidate totals — receipts, disbursements, cash on hand, debts. Federal races only (Senate / President / House). No attribution required, but credit is given as a courtesy.

Top-10 donor industries and top-10 contributing organizations per federal candidate, by cycle. Historical data collected when the API was active is still rendered on race-page "Money in this race" cards. New ingestion is blocked: the OpenSecrets public API was shut down on April 15, 2025. Replacement path under consideration: deriving industry codes directly from FEC Schedule A bulk-data downloads.

State-level candidate finance (where FEC doesn't apply — gubernatorial / state-legislative / state-AG) and ballot-measure campaign-finance committee totals (support / oppose).

Real-money prediction markets. Active 2026 contracts plus backfilled 2024 closed-event price histories. Source via Gamma API and CLOB price-history endpoint.

Real-money, CFTC-regulated prediction markets. Election-series markets via the public trade API v2, with daily candlestick history.

Real-money US-regulated CFTC no-action prediction markets with $850 / contract trader cap. Public market data via predictit.org/api/marketdata/all/. Quotes accumulate via daily snapshots.

User-generated play-money prediction-market platform. Supplemental signal where the real-money platforms have light coverage.

Primary source for related-news headlines — entity-search RSS over Google's news index. Powers the "In the news" sections on the homepage and race / topic pages. We surface the outlet, headline, and link only; we don't re-host article content.

News-volume timeseries per candidate / topic, the news-coverage volume charts, and a top-up source for related-article links where Google News comes back thin for an obscure race.

Member list scraped from aapor.org; members earn a positive trust badge on the pollster scorecard.

Per-district Partisan Voting Index, sourced via Wikipedia's Cook Partisan Voting Index article.

Direct scrape of 28 state SoS sites (PA, NV, AZ, FL, MA, NJ, OR, IA, CO, KS, OK, KY, WV, ID, NM, AK, DE, RI, CT, NH, CA, NY, LA, ME, HI, SD, UT, WY) plus North Carolina's daily statewide CSV on AWS S3. Each state's data carries a source = state_sos tag and a per-state homepage link.

National + state party-identification surveys for states without SoS party registration (Texas, Georgia, Illinois, etc.).

County demographics from the American Community Survey API (median household income, % bachelor's degree or higher, % Hispanic, median age). Powers the county-drill demographic layers on the national map.

County unemployment rate from the Local Area Unemployment Statistics API, refreshed monthly. Shown as a county-drill economic layer on the national map.

Historical county-level presidential two-party margins (2008–2024) via the openly-published tonmcg US county results dataset on GitHub, sourced from official state/county canvasses. Colors the county-drill 2024-margin choropleth.