RICHMOND, Va. — The political crisis in Virginia spun out of control Wednesday when the state’s attorney general confessed to putting on blackface in the 1980s and a woman went public with detailed allegations of sexual assault against the lieutenant governor.

With Gov. Ralph Northam’s career hanging by a thread over a racist photo in his 1984 medical school yearbook, the day’s developments threatened to take down all three of Virginia’s top elected officials, all Democrats.

The twin events began with Attorney General Mark Herring issuing a statement admitting that he wore brown makeup and a wig in 1980 to look like a rapper during a party when he was a 19-year-old student at the University of Virginia. Herring, who has been among those calling on Northam to resign, said that he was “deeply, deeply sorry” about the costume and that the days ahead “will make it clear whether I can or should continue to serve.”

Then, within hours, Vanessa Tyson, the California woman whose sexual assault allegations against Lt. Gov. Justin Fairfax surfaced earlier this week, put out a detailed statement saying that Fairfax forced her to perform oral sex on him in a hotel room in 2004 during the Democratic National Convention in Boston.

The Associated Press typically does not identify those who say they were sexually assaulted, but Tyson issued the statement in her name.

Tyson, a 42-year-old political scientist who is on a fellowship at Stanford University and specializes in the political discourse of sexual assault, said, “I have no political motive. I am a proud Democrat.”

Fairfax, who is in line to become governor if Northam resigns, has repeatedly denied her allegations, saying that the encounter was consensual and that he is the victim of a political smear. “At no time did she express to me any discomfort or concern about our interactions, neither during that encounter, nor during the months following it, when she stayed in touch with me, nor the past 15 years,” he said in a statement.

Tyson said she suffered “deep humiliation and shame” and stayed quiet about the allegations as she pursued her career, but by late 2017, as the #MeToo movement took shape and after she saw a news article about Fairfax’s campaign, she took her story to The Washington Post, which decided months later not to publish a story.

The string of scandals that began when the yearbook photo came to light last Friday could have a domino effect on Virginia state government: If Northam and Fairfax fall, Herring would be next in line to become governor. After Herring comes House Speaker Kirk Cox, a Republican.

Democrats have expressed fear that the uproar over the governor could jeopardize their chances of taking control of the GOP-dominated Virginia Legislature this year. The party made big gains in 2017, in part because of a backlash against President Donald Trump, and has moved to within striking distance of a majority in both houses.

At the Capitol, lawmakers were dumbstruck over the day’s developments, with Democratic Sen. Barbara Favola saying, “I have to take a breath and think about this. This is moving way too quickly.”

GOP House Majority Leader Todd Gilbert said it would be “reckless” to comment. “There’s just too much flying around,” he said.

Herring, 57, went public after rumors of a blackface photo of him began circulating at the Capitol.

Herring made a name for himself nationally by playing a central role in bringing gay marriage to Virginia, and he had been planning to run for governor in 2021. If he resigns, the legislature gets to pick his replacement.

In his statement, Herring said he and two friends dressed up to look like rappers they listened to, admitting: “It sounds ridiculous even now writing it.”

“That conduct clearly shows that, as a young man, I had a callous and inexcusable lack of awareness and insensitivity to the pain my behavior could inflict on others,” he said. But he also said: “This conduct is in no way reflective of the man I have become in the nearly 40 years since.”

Northam has come under pressure to resign after the discovery of a photo on his profile page in the Eastern Virginia Medical School yearbook of someone in blackface next to a person in a Ku Klux Klan outfit. He admitted at first that he was in the photo without saying which costume he was wearing, then denied it a day later. But he acknowledged he once blackened his face to look like Michael Jackson at a dance contest in Texas in 1984, when he was in the Army.