Democratic margin over Republicans in the nationwide House popular vote, in percentage points

This chart shows how Democrats took the biggest margin in the national House popular vote since 1978. They currently have +13.1 margin.

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Data as of November 9, 2026. This year's vote tally is not finalized, and the Democratic lead is expected to grow.

Chart: Andrew Prokop/VoxSource: 1976-2024 data from Brookings Institution. 2026 data from Cook Political Report