For indispensable reporting on the coronavirus crisis, the election, and more, subscribe to the Mother Jones Daily newsletter.

Update [9:20 PM EST]: With 35 percent of precincts reporting, voters have passed Amendment 1 by 58 to 42.

North Carolinians vote today on Amendment 1, a measure that would amend the state constitution—for the first time ever—to ban gay marriage. It’s worth noting that gay marriage is already illegal in North Carolina. But if the amendment passes, which the latest poll suggests it will (with a 55-39 margin), North Carolina will join the 29 other states, including California, Ohio, and Texas, that have amended their constitutions to prohibit marriage between same-sex couples.

But Amendment 1 could also have troubling implications for straight couples. Thanks to the law’s vague wording, critics argue it would likely strip away many of the legal rights associated with domestic partnerships or legal unions.

This is because Amendment 1 says “Marriage between one man and one woman is the only domestic legal union that shall be valid or recognized in this State.” While it’s being called a gay marriage ban, the amendment is more than that—it’s an all-out refusal to recognize any kind of partnership or union that isn’t marriage. So gay North Carolinians, who couldn’t get married anyway, are screwed, and so are straight, unmarried North Carolina couples.

The ACLU of North Carolina released a list explaining how bad things could get for unmarried North Carolina couples if Amendment 1 passes. Here are some rights that could be at risk:

Domestic violence laws protecting people in an unmarried partnerships might be weakened. (This claim has been debated by both sides, and it’s still unclear exactly how the law would impact domestic violence victims. Opponents of Amendment 1 say many of North Carolina’s domestic violence laws offer special protections to victims who have an established relationship with their abusers. So if the amendment narrows the law to legally recognize only marriages, it might weaken these protective laws for unmarried partners. Supporters of Amendment 1, such as Rockingham County District Attorney Phil Berger Jr., contest this claim. Berger said nothing in the amendment changes any laws on assault, rape, murder, or other crimes.)

Unmarried parents could no longer have the same child custody and visitation rights as married parents.

Private agreements between unmarried couples might not longer have a legal basis. This means, for example, that if a couple who has cohabited and raised children together for years decides to separate, the wealthier partner would not be legally obligated to divide property with his or her partner.

The law could interfere with unmarried partners’ end-of-life arrangements, such as wills, trusts, and medical powers of attorney.

Employers would no longer have to provide benefits, such as health insurance, to the partners of unmarried employees.

Amendment 1 supporters include state Rep. Larry Brown (R), who said the amendment is something North Carolina voters should decide, and televangelist Billy Graham, who ran a full-page ad in 14 North Carolina newspapers in support of the law. “The Bible is clear—God’s definition of marriage is between a man and a woman. I want to urge my fellow North Carolinians to vote for the marriage amendment,” read the advertisement.

Voters headed to the polls earlier today amid reports of confusion about Amendment 1 and what it does. A Public Policy Polling survey on May 1 whose results showed Amendment 1 leading with 55 percent of voters asked them if they knew what the law was about, and a surprising number of people were mixed up. As the New York Times reports:

Just 36 percent of voters answered correctly that it bans both same-sex marriage and domestic partnerships. An additional 26 percent thought it banned same-sex marriage alone. Meanwhile, 10 percent of voters thought a “yes” vote on the amendment would legalize rather than ban same-sex marriage, and 27 percent weren’t sure what it did.

The Asheville Citizen-Times quoted one man at the polls who stepped out of his voting box today to ask if Amendment 1 was a vote “for gay rights.”

Update 2 [9:50 PM EST]: Although North Carolina has just become the 30th state to pass a constitutional amendment banning gay marriage, my colleague Kevin Drum points out that long-term trends actually favor the legalization of gay marriage: