In 2019, less than half of those who identify as Republican — 47 percent — backed gay marriage, but the survey indicates that number rose to 51 percent last year.
Approval also increased among independents, with 72 percent now in support. In previous years, figures among independents hovered in the mid-60s.
Democratic approval stayed strong, with around three-fourths in support, similar to previous polling years.
Democrats, independents and Republicans have all polled at a steadily increasing rate over the past 10 years when it comes to approving of same-sex marriage, though GOP support has always been a minority position.