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    Chapter 3.2

    The two coalitions

    Voters with a four-year degree rose from 19.2% to 43.4% of Democratic voters in the ANES between the presidential elections of 1976 to 1988 and those of 2012 to 2024.

    DraftFigures and numbers may change as the analysis is rebuilt.what is still being checked

    The ANES and the CES disagree on the degree-holding share of Republican voters after 2008; the chapter reports both and has not resolved the difference.

    In the 2024 Cooperative Election Study (CES), 44%43.5% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 42.7% to 44.4%n31,857Weightsweight_cumulativePopulationwhite two-party presidential votersPeriod2024SourceCooperative Election Study of white voters who chose between the two major-party candidates for president voted for the Democrat, so white voters as a group leaned Republican. In the same survey, white voters made up 64%64.3% percent of Democratic votersEstimandweighted share of Democratic two-party voters who are in the groupInterval95% CI 63.3% to 65.3%n23,517Weightsweight_cumulativePopulationwhite, among Democratic two-party presidential votersPeriod2024SourceCooperative Election Study of the Democratic candidate's voters. Both numbers hold because white voters were 72%72.3% percent of all two-party votersEstimandweighted share of all two-party voters who are in the groupInterval95% CI 71.6% to 73.0%n42,008Weightsweight_cumulativePopulationwhite, among two-party presidential votersPeriod2024SourceCooperative Election Study of all two-party voters that year, and a minority of so large a group still outnumbered the Democratic voters of every other group combined. The two shares divide by different things. The first divides by white voters and says how a group voted; the second divides by Democratic voters and says who a party's voters are. Here a voter is a respondent who reported a vote for one of the two major-party candidates.

    Two shares that answer different questions

    The same two shares can be followed over time. In the American National Election Studies (ANES), voters with a four-year degree were 19.2%19.2% percent of Democratic votersEstimandweighted share of the party's two-party voters who are holders of a four-year degreeInterval95% CI 17.5% to 20.9%n2,173Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationDemocratic two-party presidential voters, holders of a four-year degreePeriod1976, 1980, 1984 and 1988 pooledSourceANES Cumulative Data File of Democratic voters in the presidential elections of 1976 to 1988 and 43.4%43.4% percent of Democratic votersEstimandweighted share of the party's two-party voters who are holders of a four-year degreeInterval95% CI 42.0% to 44.8%n9,449Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationDemocratic two-party presidential voters, holders of a four-year degreePeriod2012, 2016, 2020 and 2024 pooledSourceANES Cumulative Data File in those of 2012 to 2024. Call that the group's coalition share, with the party's voters as the denominator. Over the same two periods the Democratic share among degree holders rose from 39.2%39.2% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 36.2% to 42.2%n1,063Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationtwo-party presidential voters who are holders of a four-year degreePeriod1976, 1980, 1984 and 1988 pooledSourceANES Cumulative Data File to 62.0%62.0% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 60.6% to 63.5%n7,626Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationtwo-party presidential voters who are holders of a four-year degreePeriod2012, 2016, 2020 and 2024 pooledSourceANES Cumulative Data File. Call that the group's vote share, with the group's voters as the denominator. The coalition share says who a party's voters are, and the vote share says how a group voted. A change in one does not identify a change in the other.

    Arithmetic links the two. A group's coalition share is its share of all voters multiplied by its relative lean, the ratio of its vote share to the Democratic share of all voters.Axelrod's account of the party coalitions from 1952 to 1968 used the same arithmetic, breaking a group's contribution to a party's vote into its size, its turnout and its loyalty [1]. A group can become a larger part of a coalition because it grew, because it leaned further toward the party, or both. Its coalition share can also fall while its vote share rises. Figure 1 shows both shares in 2024 for every group in the CES.

    Figure 1

    In 2024 white voters leaned Republican and still made up most of the Democratic coalition

    Two shares for each group of two-party presidential voters in 2024: the Democratic share of the group's voters and the group's share of all Democratic voters, percent; 95% intervals from the Kish effective sample size

    • Democratic share of the group's voters
    • Group's share of Democratic voters

    Education

    Race and ethnicity

    Religion

    Age

    Gender

    Percent of two-party voters

    Show data
    Data for In 2024 white voters leaned Republican and still made up most of the Democratic coalition
    DimensionGroupShareEstimate (%)95% CI low95% CI highn voters in the denominatorGroup's share of all voters (%)Group's share of Republican voters (%)
    EducationPostgraduate degreeDemocratic share of the group's voters61.960.363.46,56516.012.0
    EducationPostgraduate degreeGroup's share of Democratic voters20.319.421.123,51716.012.0
    EducationCollege graduateDemocratic share of the group's voters52.651.253.910,42925.824.0
    EducationCollege graduateGroup's share of Democratic voters27.726.728.623,51725.824.0
    EducationSome collegeDemocratic share of the group's voters47.245.848.514,75931.132.2
    EducationSome collegeGroup's share of Democratic voters30.029.030.923,51731.132.2
    EducationHigh school or lessDemocratic share of the group's voters40.038.341.610,25527.131.8
    EducationHigh school or lessGroup's share of Democratic voters22.121.222.923,51727.131.8
    Race and ethnicityWhiteDemocratic share of the group's voters43.542.744.431,85772.380.0
    Race and ethnicityWhiteGroup's share of Democratic voters64.363.365.323,51772.380.0
    Race and ethnicityBlackDemocratic share of the group's voters81.979.884.03,7539.33.3
    Race and ethnicityBlackGroup's share of Democratic voters15.614.816.323,5179.33.3
    Race and ethnicityHispanicDemocratic share of the group's voters54.751.957.63,56410.49.2
    Race and ethnicityHispanicGroup's share of Democratic voters11.611.012.323,51710.49.2
    Race and ethnicityAsianDemocratic share of the group's voters63.058.667.41,0653.72.6
    Race and ethnicityAsianGroup's share of Democratic voters4.74.35.123,5173.72.6
    Race and ethnicityOtherDemocratic share of the group's voters43.039.147.01,7694.34.9
    Race and ethnicityOtherGroup's share of Democratic voters3.83.44.223,5174.34.9
    ReligionProtestantDemocratic share of the group's voters32.931.834.114,20136.948.5
    ReligionProtestantGroup's share of Democratic voters24.823.925.723,50636.948.5
    ReligionCatholicDemocratic share of the group's voters43.341.645.07,97318.520.6
    ReligionCatholicGroup's share of Democratic voters16.415.617.123,50618.520.6
    ReligionJewishDemocratic share of the group's voters68.064.072.11,2192.71.7
    ReligionJewishGroup's share of Democratic voters3.73.34.123,5062.71.7
    ReligionOther religionDemocratic share of the group's voters45.743.148.24,28710.911.5
    ReligionOther religionGroup's share of Democratic voters10.19.510.723,50610.911.5
    ReligionNo religionDemocratic share of the group's voters70.969.772.214,31131.017.7
    ReligionNo religionGroup's share of Democratic voters45.043.946.023,50631.017.7
    Age18 to 29Democratic share of the group's voters60.657.663.63,08211.79.1
    Age18 to 29Group's share of Democratic voters14.513.815.323,51711.79.1
    Age30 to 44Democratic share of the group's voters55.153.556.87,07323.120.3
    Age30 to 44Group's share of Democratic voters26.125.127.023,51723.120.3
    Age45 to 64Democratic share of the group's voters43.942.845.116,84835.338.8
    Age45 to 64Group's share of Democratic voters31.730.732.723,51735.338.8
    Age65 and overDemocratic share of the group's voters45.544.446.715,00529.831.8
    Age65 and overGroup's share of Democratic voters27.726.828.623,51729.831.8
    GenderWomenDemocratic share of the group's voters50.849.851.821,75950.748.7
    GenderWomenGroup's share of Democratic voters52.951.853.923,30050.748.7
    GenderMenDemocratic share of the group's voters46.645.547.819,99849.351.3
    GenderMenGroup's share of Democratic voters47.146.148.223,30049.351.3

    In the race and ethnicity panel, the vote-share dot for white voters sits to the left of their coalition-share dot, and the two dots for Black voters sit far apart in the other order. 82%81.9% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 79.8% to 84.0%n3,753Weightsweight_cumulativePopulationblack two-party presidential votersPeriod2024SourceCooperative Election Study of Black voters voted Democratic, the highest vote share of any racial or ethnic group, and Black voters were 16%15.6% percent of Democratic votersEstimandweighted share of Democratic two-party voters who are in the groupInterval95% CI 14.8% to 16.3%n23,517Weightsweight_cumulativePopulationblack, among Democratic two-party presidential votersPeriod2024SourceCooperative Election Study of Democratic voters. Every row has two dots with their 95% intervals, the Democratic share of the group's voters and the group's share of Democratic voters, among two-party presidential voters in the 2024 CES. Values, with each group's share of all voters and of Republican voters, in Table 1.

    Note: The CES is an opt-in online panel, so its intervals are model based and do not cover how respondents were recruited.Source: Cooperative Election Study cumulative file, 2024; weighted (weight_cumulative); two-party presidential voters

    Three surveys and two pooled periods

    The ANES interviews different people in each election. Its cumulative file has a presidential vote and demographics for every election from 1952 to 2024, with 34,42334,423 respondentsEstimandcount of respondents with a positive vote weightWeightsnone (count)PopulationANES respondents who reported a Democratic or Republican presidential votePeriod1952 to 2024SourceANES Cumulative Data File respondents who reported a vote for the Democratic or the Republican candidate. The CES is an online opt-in panel that begins in 2008 and records finer racial and religious categories. The Current Population Survey (CPS) voting supplement asks about turnout and records no vote choice, so the chapter uses it only for the make-up of eligible adults and of voters. Every estimate is weightedSurvey weightsNumbers that scale each respondent so the sample matches the population on known traits such as age, race, education and region. A weighted average counts a respondent with a large weight for more than one with a small weight.. For comparisons across time the chapter pools four elections at each end, 1976 to 1988 and 2012 to 2024, so that small groups have enough respondents, and it gives each election the same weight. Vote and turnout are self-reports. The qualification that matters is survey lean. Set against the certified count, the ANES leans Democratic in its later elections, so changes in vote shares between the two periods are larger in the ANES than in the count. The surveys also disagree about who the voters are. From 2008 to 2024 the share of Republican voters holding a four-year degree changed by −8.5−8.5 percentage pointsEstimand2024 minus 2008 share; independent elections, standard errors combinedInterval95% CI −14.2 to −2.8n2,238Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z)PopulationRepublican two-party presidential voters, with a four-year degreePeriod2008 to 2024SourceANES Cumulative Data File points in the ANES and by +7.8+7.8 percentage pointsEstimand2024 minus 2008 share; independent elections, standard errors combinedInterval95% CI 6.4 to 9.2n30,557Weightsweight_cumulativePopulationRepublican two-party presidential voters, with a four-year degreePeriod2008 to 2024SourceCooperative Election Study points in the CES. The ANES fall is absent from its web samples, which like the CES are collected online. The report gives every estimate with its interval and sample size.

    White voters' two shares moved in opposite directions

    Between the two pooled periods the Democratic vote share among white non-Hispanic voters rose, from 39.4%39.4% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 37.8% to 40.9%n4,030Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationtwo-party presidential voters who are white non-HispanicPeriod1976, 1980, 1984 and 1988 pooledSourceANES Cumulative Data File to 44.4%44.4% percent of the group's voters voting DemocraticEstimandweighted Democratic share of the group's two-party votersInterval95% CI 43.2% to 45.6%n12,097Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationtwo-party presidential voters who are white non-HispanicPeriod2012, 2016, 2020 and 2024 pooledSourceANES Cumulative Data File. Their coalition share fell, from 72.7%72.7% percent of Democratic votersEstimandweighted share of the party's two-party voters who are white non-HispanicInterval95% CI 70.8% to 74.6%n2,179Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationDemocratic two-party presidential voters, white non-HispanicPeriod1976, 1980, 1984 and 1988 pooledSourceANES Cumulative Data File of Democratic voters to 58.0%58.0% percent of Democratic votersEstimandweighted share of the party's two-party voters who are white non-HispanicInterval95% CI 56.6% to 59.4%n9,493Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationDemocratic two-party presidential voters, white non-HispanicPeriod2012, 2016, 2020 and 2024 pooledSourceANES Cumulative Data File. Both changes are in the ANES, and both follow from the arithmetic. White non-Hispanic voters became a smaller share of all voters, which lowers their coalition share. Their vote share rose by less than the Democratic share of all voters did, so their relative lean fell as well. Their share of Republican voters fell too, so both coalitions became less white, and the Democratic coalition changed by the larger amount. A reader who hears that white voters moved toward the Democratic candidate and that the Democratic coalition became less white has heard two true statements about one group.

    Figure 2 shows the make-up of each coalition in the two periods along six dimensions. In the race view the white segment shrinks in both pairs of bars, and the segment that grows, in both coalitions, is Hispanic voters and voters of other races. The education view carries the chapter's lead finding, the four-year degree segment growing in both coalitions and by more in the Democratic one. The income view shows the highest income third growing as a share of Democratic voters, and in the religion view Protestants fall in both coalitions.

    Figure 2

    White non-Hispanic voters fell from 72.7% to 58.0% of Democratic voters and from 94.8% to 85.9% of Republican voters

    Make-up of each party's two-party presidential voters, percent, in 1976 to 1988 and 2012 to 2024 (the buttons switch the dimension); pooled elections; 95% intervals from the Kish effective sample size

    • White non-Hispanic
    • Black non-Hispanic
    • Hispanic or another race
    Show data
    Data for Four-year degree holders rose from 19.2% to 43.4% of Democratic voters and from 25.2% to 31.4% of Republican voters
    DimensionParty and periodGroupShare of the party's voters (%)95% CI low95% CI highn party votersn in group
    EducationDemocratic voters, 1976 to 1988No four-year degree80.879.182.52,1731,754
    EducationDemocratic voters, 1976 to 1988Four-year degree or more19.217.520.92,173419
    EducationDemocratic voters, 2012 to 2024No four-year degree56.655.258.09,4494,639
    EducationDemocratic voters, 2012 to 2024Four-year degree or more43.442.044.89,4494,810
    EducationRepublican voters, 1976 to 1988No four-year degree74.873.176.52,5631,919
    EducationRepublican voters, 1976 to 1988Four-year degree or more25.223.526.92,563644
    EducationRepublican voters, 2012 to 2024No four-year degree68.667.270.17,1564,340
    EducationRepublican voters, 2012 to 2024Four-year degree or more31.429.932.87,1562,816
    IncomeDemocratic voters, 1976 to 1988Lowest third33.531.435.62,011664
    IncomeDemocratic voters, 1976 to 1988Middle third35.733.537.82,011716
    IncomeDemocratic voters, 1976 to 1988Highest third30.928.832.92,011631
    IncomeDemocratic voters, 2012 to 2024Lowest third24.923.626.29,2362,855
    IncomeDemocratic voters, 2012 to 2024Middle third32.531.233.99,2363,111
    IncomeDemocratic voters, 2012 to 2024Highest third42.641.144.09,2363,270
    IncomeRepublican voters, 1976 to 1988Lowest third20.318.621.92,376474
    IncomeRepublican voters, 1976 to 1988Middle third34.632.736.62,376813
    IncomeRepublican voters, 1976 to 1988Highest third45.143.047.12,3761,089
    IncomeRepublican voters, 2012 to 2024Lowest third21.119.822.46,9081,911
    IncomeRepublican voters, 2012 to 2024Middle third35.634.137.26,9082,506
    IncomeRepublican voters, 2012 to 2024Highest third43.341.744.86,9082,491
    Race and ethnicityDemocratic voters, 1976 to 1988White non-Hispanic72.770.874.62,1791,594
    Race and ethnicityDemocratic voters, 1976 to 1988Black non-Hispanic20.018.321.72,179425
    Race and ethnicityDemocratic voters, 1976 to 1988Hispanic or another race7.36.28.42,179160
    Race and ethnicityDemocratic voters, 2012 to 2024White non-Hispanic58.056.659.49,4935,863
    Race and ethnicityDemocratic voters, 2012 to 2024Black non-Hispanic19.918.721.09,4931,778
    Race and ethnicityDemocratic voters, 2012 to 2024Hispanic or another race22.120.923.39,4931,852
    Race and ethnicityRepublican voters, 1976 to 1988White non-Hispanic94.893.995.72,5702,436
    Race and ethnicityRepublican voters, 1976 to 1988Black non-Hispanic1.30.91.82,57033
    Race and ethnicityRepublican voters, 1976 to 1988Hispanic or another race3.93.14.62,570101
    Race and ethnicityRepublican voters, 2012 to 2024White non-Hispanic85.984.887.07,1906,234
    Race and ethnicityRepublican voters, 2012 to 2024Black non-Hispanic1.61.22.07,19082
    Race and ethnicityRepublican voters, 2012 to 2024Hispanic or another race12.511.513.57,190874
    ReligionDemocratic voters, 1976 to 1988Protestant59.557.461.62,1861,293
    ReligionDemocratic voters, 1976 to 1988Catholic28.026.029.92,186619
    ReligionDemocratic voters, 1976 to 1988Jewish, another religion or none12.611.114.02,186274
    ReligionDemocratic voters, 2012 to 2020Protestant36.034.537.67,3492,676
    ReligionDemocratic voters, 2012 to 2020Catholic21.820.423.17,3491,571
    ReligionDemocratic voters, 2012 to 2020Jewish, another religion or none42.240.643.87,3493,102
    ReligionRepublican voters, 1976 to 1988Protestant68.867.070.72,5691,773
    ReligionRepublican voters, 1976 to 1988Catholic23.121.524.82,569595
    ReligionRepublican voters, 1976 to 1988Jewish, another religion or none8.07.09.12,569201
    ReligionRepublican voters, 2012 to 2020Protestant52.350.554.05,4972,881
    ReligionRepublican voters, 2012 to 2020Catholic22.521.024.05,4971,258
    ReligionRepublican voters, 2012 to 2020Jewish, another religion or none25.223.726.75,4971,358
    AgeDemocratic voters, 1976 to 198818 to 2919.217.620.92,182409
    AgeDemocratic voters, 1976 to 198830 to 4430.628.632.62,182675
    AgeDemocratic voters, 1976 to 198845 to 6431.229.233.12,182687
    AgeDemocratic voters, 1976 to 198865 and over19.017.320.72,182411
    AgeDemocratic voters, 2012 to 202418 to 2918.517.419.69,3041,125
    AgeDemocratic voters, 2012 to 202430 to 4424.623.425.99,3042,255
    AgeDemocratic voters, 2012 to 202445 to 6434.633.235.99,3043,301
    AgeDemocratic voters, 2012 to 202465 and over22.321.123.59,3042,623
    AgeRepublican voters, 1976 to 198818 to 2918.917.420.52,564472
    AgeRepublican voters, 1976 to 198830 to 4433.031.234.92,564851
    AgeRepublican voters, 1976 to 198845 to 6429.627.831.42,564765
    AgeRepublican voters, 1976 to 198865 and over18.516.920.02,564476
    AgeRepublican voters, 2012 to 202418 to 2913.112.014.26,976548
    AgeRepublican voters, 2012 to 202430 to 4421.520.222.86,9761,431
    AgeRepublican voters, 2012 to 202445 to 6440.038.541.66,9762,685
    AgeRepublican voters, 2012 to 202465 and over25.424.026.86,9762,312
    GenderDemocratic voters, 1976 to 1988Women58.656.560.72,1911,286
    GenderDemocratic voters, 1976 to 1988Men41.439.343.52,191905
    GenderDemocratic voters, 2012 to 2024Women55.554.056.99,4955,391
    GenderDemocratic voters, 2012 to 2024Men44.543.146.09,4954,104
    GenderRepublican voters, 1976 to 1988Women53.251.255.22,5791,373
    GenderRepublican voters, 1976 to 1988Men46.844.848.82,5791,206
    GenderRepublican voters, 2012 to 2024Women49.648.051.17,2053,564
    GenderRepublican voters, 2012 to 2024Men50.448.952.07,2053,641

    The white non-Hispanic segment is shorter in the later bar of each pair, and by more in the Democratic pair; the segment for Hispanic voters and voters of other races grows in both. Each bar is one party's two-party voters in one pooled period, split into groups, so a segment is a coalition share and the segments in a bar sum to the whole. The buttons switch to education, income, religion, age and gender; the religion view ends in 2020 because the cumulative file's 2024 religion codes are unusable. Values with their intervals in Table 5.

    Note: Each period pools four elections, 1976, 1980, 1984 and 1988 against 2012, 2016, 2020 and 2024, and every election has the same total weight. The religion view ends in 2020 because the 2024 religion codes of the cumulative file are unusable.Note: Intervals are model based (Kish effective sample size, normal approximation) and ignore clustering in the sample design.Note: Stacked bars carry no whiskers; the interval and the number of voters in the party's denominator are in the tooltip and the table.Source: ANES Cumulative Data File, 1976 to 1988 and 2012 to 2024; weighted (weight_postelection where the file has one, else weight; each election has the same total weight); two-party presidential voters

    A change in a vote share does not identify persuasion

    A rising vote share is easy to read as a group changing its mind, and repeated cross-sections cannot show that. The Democratic share of all ANES voters rose between the two periods, and Figure 3 splits that rise using cells defined by sex, three racial and ethnic groups and four age bands. The part that comes from a different mix of voters across those cells is +2.9+2.9 percentage pointsEstimandchange in the Democratic share from the change in the mix of voters across sex, race and age cells; seeded bootstrapInterval95% CI 2.1 to 3.8n21,554Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationall two-party votersPeriod1976 to 1988 to 2012 to 2024SourceANES Cumulative Data File pointsPercentage pointThe unit for the difference between two percentages. A change from one share to another is stated in points, not in percent, so that absolute and relative change are not confused., and the part that comes from a different Democratic share inside the cells is +5.3+5.3 percentage pointsEstimandchange in the Democratic share from the change inside sex, race and age cells; seeded bootstrapInterval95% CI 3.6 to 6.8n21,554Weightsweight_postelection where the file has one (1996 to 2008, 2016 to 2024), else weight (VCF0009z); pooled periods give each election the same total weightPopulationall two-party votersPeriod1976 to 1988 to 2012 to 2024SourceANES Cumulative Data File points. The split is an accounting identity under those cells, so the two parts sum to the change and say nothing about why either moved. The within-cell part holds voters who changed their vote, new voters who replaced those who died, and different people voting in the same cell from one election to the next. It also holds changes in how the surveys sampled each cell and the surveys' own lean. Among degree holders the make-up of graduates by sex, race and age accounts for little of the rise in the vote share, and that does not make the rise persuasion either. Chapter 2.1, Cohort change in partisan sorting separates switching from replacement for ideology by following birth cohorts, which these vote questions are too thin to support.

    Figure 3

    The mix of voters accounts for +2.9 points of the change in the Democratic share and change within groups of the same sex, race and age for +5.3 points

    Change in the Democratic share of two-party presidential voters from 1976 to 1988 to 2012 to 2024, split into the mix of voters across sex, race and age cells and change within cells, percent and percentage points; ANES; the buttons switch the voters

    Show data
    Data for The mix of voters accounts for +2.9 points of the change in the Democratic share and change within groups of the same sex, race and age for +5.3 points
    VotersStepValue95% CI low95% CI highn
    All two-party votersDemocratic share, 1976 to 198845.944.547.44,770
    All two-party votersChange in the mix of voters2.92.13.821,554
    All two-party votersChange within groups of the same sex, race and age5.33.66.821,554
    All two-party votersDemocratic share, 2012 to 202454.153.155.216,784
    Voters with a four-year degreeDemocratic share, 1976 to 198839.236.242.21,063
    Voters with a four-year degreeChange in the mix of voters1.1−0.12.98,689
    Voters with a four-year degreeChange within groups of the same sex, race and age21.718.024.88,689
    Voters with a four-year degreeDemocratic share, 2012 to 202462.060.663.57,626
    Voters without a four-year degreeDemocratic share, 1976 to 198847.846.149.43,673
    Voters without a four-year degreeChange in the mix of voters4.73.55.912,652
    Voters without a four-year degreeChange within groups of the same sex, race and age−3.2−5.4−1.512,652
    Voters without a four-year degreeDemocratic share, 2012 to 202449.347.950.88,979

    The first bar is the Democratic share of all two-party voters in 1976 to 1988 and the last bar the share in 2012 to 2024. Of the two steps between them, the change in the mix of voters is the smaller and the change within cells of the same sex, race and age the larger. The steps carry bootstrap intervals and the bars intervals from the Kish effective sample sizeEffective sample sizeThe number of equally weighted respondents that would give the same precision as the weighted sample. It is smaller than the raw count when the weights vary a lot, and it sets how wide the confidence interval is.. The buttons restrict the voters by degree. Among degree holders the mix of voters accounts for little of the change, and among voters without a degree a rise from the mix and a fall within cells leave the share barely moved. Values in Table 8.

    Note: The first and last bars carry Kish intervals and the two steps carry bootstrap intervals. The cells combine sex, race and ethnicity (white non-Hispanic, Black non-Hispanic, Hispanic or another race) and four age bands; a respondent with a missing value forms a cell of its own. A cell with no respondents in one period takes the other period's Democratic share, so it adds nothing to the within-cell term.Note: Intervals come from a bootstrap that resamples respondents within each election (400 replicates, seed 12345). The split is symmetric between the mix and the within-cell change.Source: ANES Cumulative Data File, 1976 to 1988 and 2012 to 2024; weighted (weight_postelection where the file has one, else weight; each election has the same total weight); two-party presidential voters

    What these surveys cannot tell you

    The surveys interview different people in each election, so the chapter compares groups and never individuals. It cannot say whether any voter changed party, how much of a change comes from older voters leaving the electorate and younger ones entering it, or how much comes from different people turning out. Vote and turnout are self-reports. The ANES leans Democratic in its later elections, the CES is an opt-in panel and the CPS records no vote, so no survey here measures a party's voters exactly. A check against voter records, the usual test of self-reported vote and turnout, is not available for either vote file [2]. The ANES and the CES also disagree about whether the degree-holding share of Republican voters rose or fell after 2008, and the chapter reports both. The two periods, 1976 to 1988 and 2012 to 2024, were chosen to give each group enough respondents, and a different choice of years would give different numbers.


    Go deeper

    • The report: every estimate with its interval and sample size.
    • Tables: every figure of the report as a table.

    Data sources

    • ANES Cumulative Data FileCumulative Data File, presidential years 1952 to 2024Years: 1948-2024 (33 study years; even years only after 2004; no 2006, 2010 or 2014 study) · Weights: weight_postelection where available, else VCF0009z · License: Free download after accepting the ANES terms of use; cite the release.
    • ANES 2024 Time Series2024 Time Series, summary religion code, one comparison with the CESYears: 2024 (pre-election and post-election interviews) · Weights: V240107b · License: Free download after accepting the ANES terms of use; cite the release.
    • Cooperative Election StudyCumulative Common Content, presidential years 2008 to 2024Years: 2006-2024 (every year; self-reported turnout is available in the 10 even years) · Weights: weight_cumulative · License: See the provider's terms of use.
    • CPS Voting and Registration SupplementNovember Voting and Registration Supplement, presidential years 1996 to 2024 (and 1976 to 1988 for one comparison), adults aged 18 or olderYears: 1976-2024 (25 November samples, biennial, even years) · Weights: VOSUPPWT · License: IPUMS CPS conditions of use: a free extract after registration, no fee may be charged for the data, IPUMS must be cited, and publications are to be added to the IPUMS bibliography. The underlying Census Bureau data are public domain.
    • State presidential returnsState presidential returns 1976 to 2024, certified national two-party shareYears: 1976-2024 (13 elections) · Weights: none (full counts) · License: See the provider's terms of use.

    All data sources

    References

    1. Axelrod, Robert (1972). Where the Votes Come From: An Analysis of Electoral Coalitions, 1952-1968. American Political Science Review 66(1): 11-20. doi:10.2307/1959275
    2. Ansolabehere, Stephen; Hersh, Eitan (2012). Validation: What Big Data Reveal About Survey Misreporting and the Real Electorate. Political Analysis 20(4): 437-459. doi:10.1093/pan/mps023

    How to cite

    @misc{singh2026thetwocoalitions,
      author = {Singh, Vishal},
      title = {The two coalitions},
      year = {2026},
      url = {https://vishalsingh.org/politics/the-two-coalitions},
      note = {In The Public Mind. Published 3 October 2026.}
    }