U.S. political composition of states 2008-2018, by party affiliation

Aggregated political composition of all states in the United States between 2008 and 2018, by party affiliation

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Source

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Release date

February 2019

Region

United States

Survey time period

2008 to 2018

Number of respondents

75,669*

Age group

18 years and older

Method of interview

Telephone interview

Supplementary notes

Values are the average of multiple polls held throughout the time period.
*The 2018 poll contained 75,669 respondents. Sample size for other years is not disclosed by the source.
Solid states are those in which a party has a 10-point or greater advantage; leaning states are those in which a party has an advantage of more than five points but fewer than 10 points. Competitive states are those in which the party advantage is five points or less.

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