Punctuated by the landmark 2015 Obergefell v. Hodges case which legalized same-sex marriage in all 50 states, approval among the U.S. public has risen consistently since 2012. According to the most recent survey by Gallup in May this year, that level has just moved to an all-time high of 70 percent.
Broken down by political party, 83 percent of Democrat supporters signified their backing, while a majority of Republicans did the same in 2021 - 55 percent. Gallup also observed a difference in opinion between age groups, with 84 percent of 18 to 34 year olds in favour, and 72 percent among 35 to 54 year olds, while this fell to 60 percent for those 55 and over.
