Established Fact
Analysis of public FEC filings identified statistically anomalous frequencies of contributions in exact round-dollar amounts ($1, $5, $10, $15) attributed to single named donors over compressed time periods — a pattern inconsistent with typical individual donor behavior.
Citations
Analysis of FEC bulk data (Schedule A filings), FEC.gov, https://www.fec.gov/data/browse-data/?tab=bulk-data
Election Research Institute, Anomalous Contribution Patterns in 2020 Small-Dollar Online Fundraising (2023) (methodology subject to verification)