Republican support trends: Yes—recent Gallup and PRRI data show a notable decline. In July 2015, just after Obergefell v. Hodges, 30% of Republicans supported same-sex marriage. Support climbed steadily, peaking at 55% in 2021-2022. As of May 2025, Gallup reports GOP support has dropped to 41%, the lowest since 2016. Democratic support has reached a record 88%, and independents stand at 76%. State-level breakdowns: PRRI's 2024 state survey found majority support in every state, with the lowest in Mississippi (~52%) and the highest in Massachusetts and Vermont (80%+). Red states generally poll in the mid-50s to low-60s, while blue states cluster in the 70-80% range. The partisan gap is widest in deep-red states, where Republican support can be 20-30 points lower than the state average. Historical comparison: In May 2015, Gallup measured national support at 60% overall—74% among Democrats, 62% independents, and 30% Republicans. By 2022 (post-Dobbs), support was 71% overall, with Democrats at 87%, independents at 77%, and Republicans at 55%. The 2025 numbers—68% overall, with the GOP drop to 41%—reflect a widening partisan divide despite stable national averages. Key takeaway: While national support remains high and stable, Republican voter backing has eroded in the past three years, creating the largest partisan gap since Obergefell. State-level data confirms strong majorities in most places, but the intensity and durability of support vary sharply by party and geography.
1. Is Republican voter support for same-sex marriage declining significantly? Yes, the data shows a clear decline. After years of steady growth, Republican support peaked around the low-to-mid 50s in 2021-2022 but has since fallen into the low 40s by 2024-2025. This has widened the partisan gap to its highest level in recent years. 2. Do you have state-level breakdowns (red vs. blue states)? State-level data reinforces the national divide. Blue states and many battleground states consistently show strong majorities in favor of same-sex marriage, often well above national averages. Red states, particularly in the South and parts of the Midwest, tend to lag, with support at or below 50 percent, creating sharp contrasts across regions. 3. Can you provide historical comparisons (2015 vs. 2025)? In 2015, when Obergefell was decided, national support hovered around 60 percent, with Republican support substantially lower. By the early 2020s, overall support climbed into the high 60s and low 70s, while Republicans reached majority support for the first time. Since Dobbs in 2022, however, Republican numbers have slipped, returning to the low 40s by 2025, while Democrats and independents remain strongly supportive.