A new Gallup poll finds support for same-sex marriage and relationships in the U.S. has stopped rising after two decades. About two-thirds of U.S. adults believe same-sex marriage should be legal, according to the poll, down slightly from 71% in 2022 and 2023. Most of the change is driven by Republicans. The views of Democrats and independents on the topic have remained mostly stable. A 2015 U.S. Supreme Court decision led to nationwide recognition of same-sex marriage. Conservative lawmakers in some states have called for that ruling to be overturned, something the court has so far rejected considering. The poll also found a shift in views of transgender issues.