Political composition of states by party U.S. 2018

Over the last two years, the number of states either identifying with or leaning towards the Democratic Party has been growing, increasing from 14 in 2016 to 22 in 2018. Corresponding to this has been a decline in both: support for the Republicans, which fell from 21 to 18; and the number of states that can be considered competitive, which fell from 15 to 10.

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

Characteristic	Solid Democrat	Lean Democrat	Competitive	Lean Republican	Solid Republican
2018	14	8	10	5	13
2017	15	4	15	3	13
2016	13	1	15	7	14
2015	11	3	16	8	12
2014	11	6	18	5	10
2013	12	5	19	2	12
2012	13	6	19	3	9
2011	11	7	15	7	10
2010	13	9	18	5	5
2009	23	10	12	1	4
2008	29	6	10	1	4

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Release date

February 2019

More information

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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