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2025 Cook Partisan Voting Index

The 2025 Cook Partisan Voting Index (Cook PVI) reports how each congressional district performed at the presidential level relative to the nation.

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Jan 29, 2026
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What is the Cook Partisan Voting Index and how is it calculated for 2025?

The Cook Partisan Voting Index () is a widely used metric that measures how strongly a congressional district or state leans Democratic or Republican relative to the national presidential vote; a labe...