Seats: Census 2020 apportionment https://www.census.gov/data/tables/2020/dec/2020-apportionment-data.html ; cross-check https://www.thegreenpapers.com/G26/House.phtml ; FEC https://www.fec.gov/files/bulk-downloads/2026/cn26.zip ; general date https://www.fec.gov/resources/cms-content/documents/2026pdates.pdf