The nearly two million members of the U.S. Presbyterian Church may vote soon to officially support same-sex marriage.

The U.S. Presbyterian Church (PCUSA) boasts nearly two million members, according to their Facebook page, and they’re about to vote on changing their constitution to support same-sex marriage.Â

“The 171 regional ‘presbyteries’ or local leadership bodies of the church have been voting on whether to change the wording to call marriage a contract ‘between a woman and a man’ to being ‘between two people, traditionally a man and a woman,'” Reuters reports today.

Marriage equality supporters need a simple majority, or 86 votes, to pass the change. They have 85. An unofficial vote tally is here.

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Over the past few years, the Presbyterian Church has faced various splits, with its more conservative members peeling away over social justice issues like same-sex marriage.

Last summer, the 221st General Assembly of the Presbyterian Church,Â (U.S.A.), as it is officially known, voted to support same-sex marriage, and ordered a vote of its localÂ leadership for this year. That vote may come as soon as tonight.

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Image byÂ SelbeÂ via Flickr and a CC license