California Secretary of State
Kind: Official state elections authority
URL: https://www.sos.ca.gov/elections/upcoming-elections/primary-election-june-2-2026
Publishes the certified candidate list, write-in candidate list, candidate contact list, and 10-year party-preference history as PDFs on a CloudFront-fronted S3 bucket. No machine-readable API. PDFs are regenerated as filings are processed; refresh periodically.