SeatShare

SeatShare

Share of the vote against share of the seats, US elections 1968-2024

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Data: MIT Election Data and Science Lab, and Carl Klarner's State Legislative Election Returns, via Harvard Dataverse. House counts are first-round general election votes; Florida records unopposed winners as 1 vote, and some states record none, so uncontested seats pull a party's vote share down. Electoral votes assume winner-take-all except the recorded Maine and Nebraska splits, and ignore faithless electors. Party lines: roll calls from Voteview (Lewis, Poole, Rosenthal, Boche, Rudkin and Sonnet). Source on GitHub.