2025 specials show a big swing left from 2024

Special elections in the 119th Congress for U.S. House seats by the 2024 presidential margin in the district and the special election margin

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*Blanket primary election in which each major party had more than one candidate on the ballot. Special election margin is based on aggregate Democratic and Republican vote totals.

Source: The Downballot, Greg Giroux, State Election Sources