Attribution

Wikipedia. Ratings, candidate lists, poll tables, and the generic ballot are fetched with the Wikipedia REST API (en.wikipedia.org/api/rest_v1/page/html). Wikipedia text is available under CC BY-SA. Credit Wikipedia, and link the article that supplied the table.
Forecasters. Cook Political Report, Sabato’s Crystal Ball, Inside Elections, and the other houses are quoted only as they appear in those Wikipedia tables, with the as-of date and the link Wikipedia printed. Their sites are not scraped. Cook Political Report Decision Desk HQ The Economist Fifty Plus One Fox News Inside Elections RealClearPolitics Sabato's Crystal Ball Silver Bulletin Split Ticket
Kalshi. Prices from api.elections.kalshi.com. Attribute Kalshi.
Polymarket. Prices from gamma-api.polymarket.com. Attribute Polymarket.
PredictIt. Off unless ENABLE_PREDICTIT=1. PredictIt publishes market data for non-commercial use and requires attribution to PredictIt. Leave it off for any commercial deployment.
Federal Election Commission. Senate receipts from api.open.fec.gov when an API key is configured. Candidate pages link back to fec.gov.
civicAPI. Results adapter uses civicapi.org, which is free for commercial use with attribution and makes its own upstream calls. Test-data responses must be labeled synthetic.
Census Bureau. Congressional district and state boundaries are Census TIGER / cartographic boundary files, public domain. Missouri is drawn from the 119th Congress layer (the restored 2022 plan). Other states use the 120th Congress layer.
News. Headlines are titles and links from The Hill campaign RSS and Politico politics RSS. The articles stay on those sites.

ShowdownWire is an independent tracker. It is not affiliated with any candidate, party, campaign, forecaster, or market venue named on this site.