Southern Baptists plan to vote this week on acting to overturn Obergefell v. Hodges, the Supreme Court ruling that legalized gay marriage 10 years ago this month.

The step is part of a growing effort by evangelicals nationwide to reverse Obergefell, and coincides with a renewed campaign in state legislatures to challenge the widely accepted view that same-sex marriage has become an established civil right.

While the Southern Baptist Convention has long opposed gay marriage, the vote at its annual meeting in Dallas will be the first time that the largest Protestant denomination in America will ask representatives of its tens of thousands of member churches to work to end it.

Conservative Christian activists hope to build on their movement’s success in overturning Roe v. Wade, the now-defunct Supreme Court ruling that legalized abortion, in 2022, and to apply the legal and political strategies that proved effective for that victory. Public support for legal gay marriage remains high, with more than two-thirds of American adults supporting it. As with abortion, activists hope to gain political power despite their minority viewpoints.

“Christians are called to play the long game,” said Andrew T. Walker, an ethicist at a Southern Baptist seminary in Kentucky who wrote the resolution. He leads the Southern Baptist Convention’s resolution committee, which coordinates proposals from Baptists around the country to be put for a vote at the annual meeting.