SACRAMENTO — The fallout over sexual misconduct allegations against Rep. Eric Swalwell grew Saturday as his fellow gubernatorial candidates faced a new race and Democrats were forced into a rapid test of how they respond to accusations of sexual misconduct.

Within hours of the accusations against Swalwell being made public, the Northern California congressman’s campaign began to unravel and a chorus of top Democrats urged him to drop out. Staff members resigned, his fundraising website went offline and allies moved quickly to distance themselves from a candidate who had been gaining momentum as a front-runner in the race to lead the Golden State.

The repercussions extended beyond Swalwell’s campaign for governor. The Manhattan district attorney’s office opened an investigation into sexual assault allegations against Swalwell by a former staffer and issued a statement Saturday that urged “survivors and anyone with knowledge of these allegations to contact our Special Victims Division.” Rep. Anna Paulina Luna (R-Fla.) posted a video on X saying that she plans to force a House vote next week to expel Swalwell.

Swalwell has denied the allegations, calling them “flat [out] false.”

The upheaval has created an opening for lesser-known contenders to gain traction just as voters are beginning to turn their attention to the race — a spotlight now intensified by the controversy.

The speed and severity of the response underscores how quickly political support can erode — and reflects a broader shift in how such allegations are handled in the post-#MeToo era, which has been intensified by the scrutiny surrounding the late financier and convicted sex offender Jeffrey Epstein.

“Ask any woman staffer over the age of 45 what her experience was like, and this was a fairly prevalent sort of situation,” said Elizabeth Ashford, a veteran Democratic strategist. “It was allowed. I really think it shows a lot of growth on the part of political professionalism, that these things are taken seriously.”

As of Saturday afternoon, Swalwell ignored calls to drop out of the race and resign from Congress, even as outrage and criticism swelled. A Bay Area fundraiser was canceled and major institutional backers abandoned the campaign. The California Labor Federation withdrew its endorsement, SEIU California rescinded its backing and urged Swalwell to exit the race, and the California Police Chiefs Assn. suspended its support.

Speculation swirled Saturday about Swalwell’s whereabouts after the congressman announced that he intended to spend time with his wife.

A man who opened the door of Swalwell’s rental home in Livermore early Saturday refused to talk to a Times reporter. Swalwell has claimed that he rents space in the one-story house, located on a quiet cul-de-sac. He also owns a home in Washington, D.C., but no one inside responded when a reporter rang Saturday.

Livermore residents couldn’t escape news of the scandal. “Swalwell faces assault claims,” read the front page of the East Bay Times, stacked up at the Lucky grocery story around the corner from Swalwell’s rental home.

The most serious allegation against Swalwell is from a woman who worked for the congressman who said their relationship was at times consensual, but that he sexually assaulted her twice when she was too intoxicated to consent, according to the San Francisco Chronicle. Three other women have also accused Swalwell of sexual misconduct, including sending unsolicited nude photos, according to CNN.

The allegations prompted several members of his campaign to abruptly walk away from their jobs. One senior campaign staffer said they resigned after hearing the seriousness of the allegations, adding that they didn’t want to be put in a position where they were using their own credibility to defend Swalwell.

Former staffers in Swalwell’s congressional office traded messages in group texts after the news reports, with many expressing shock and horror at the allegations, according to two former employees.

A group of senior staff in Swalwell’s congressional office and campaign said in a statement Saturday that they “stand with our former colleague and the other women who have come forward” and that others “should stand with them, too.”

Kyle Alagood, an attorney who worked for Swalwell’s congressional office and his short-lived presidential campaign, told The Times he was “disgusted and pissed off.”

“I pray he has the decency to resign for the sake of his wife and kids,” said Alagood, adding that Swalwell must also “face the full legal consequences of his actions.”

Rob Stutzman, a longtime GOP strategist, said the impact of Swalwell’s political advisers quitting and his endorsements being yanked has sunk his chances in the governor’s race whether he stays in or not.

Stutzman advised former Gov. Arnold Schwarzenegger during the 2003 recall when The Times reported allegations of inappropriate behavior with women during his bodybuilding and film career. Stutzman said the severity of the allegations against Swalwell makes the situation very different from that involving Schwarzenegger, who didn’t lose endorsements.

“If this had been the circumstances … I would have quit,” Stutzman said. “They’re just not the same.”

While Swalwell’s political future hangs in the balance, political insiders are closely watching who will be the beneficiary of the chaos. There are eight Democrats running: billionaire Tom Steyer, former Orange County Rep. Katie Porter, state schools Supt. Tony Thurmond, former U.S. Health and Human Services Secretary Xavier Becerra, San José Mayor Matt Mahan, former Los Angeles Mayor Antonio Villaraigosa, former state Controller Betty Yee and Swalwell. There are two GOP candidates: Steve Hilton, a former Fox News commentator, and Riverside County Sheriff Chad Bianco.

Loyola Marymount University law professor Jessica Levinson said that with key endorsements, such as labor, now back up for grabs, anyone can jump to the front of the pack. She said the safest bet on who will gain an advantage is Porter and Steyer, who with Swalwell have been the top candidates in recent opinion polls.

“But, I think this is a race where there is no heir apparent,” Levinson said. “You can’t rule out surprises anymore in this race.”

Paul Mitchell, a veteran Democratic strategist, agreed that the upheaval benefits Porter and Steyer, adding that Swalwell’s chances have been reduced to zero.

“First off, I think that staying in the race is not tenable,” Mitchell said. “And so if he does drop out of the race, what it means is that you’re going to have a lot of progressive voters looking for somebody else to go to and the primary beneficiaries should be Porter and Steyer right now, because they’re the other two that are in that kind of first tier of Democratic candidates that have been splitting up that progressive base.”

Allegations of inappropriate behavior by Swalwell had circulated for weeks on social media and in political circles. Once the San Francisco Chronicle and CNN posted stories with details from women accusing Swalwell of sexual misconduct, including rape, the swift rebuke was likened by one political strategist to a bomb detonating.

Those media outlets reported that the staff member accusing Swalwell of rape was 21 when she began working for him in 2019 in his Castro Valley district office. She said Swalwell, who is nearly two decades older, quickly began sending her messages and then nude pictures on Snapchat, a platform in which messages and images disappear after being viewed.

She said that in September 2019 she had drinks with the congressman, blacked out and could tell she had had intercourse when she woke up naked in Swalwell’s hotel bed, according to the report. In a separate encounter years later, she said he forced himself on her while she was too intoxicated to consent and despite her protests.

She said she did not report the incidents to police, citing fears she would not be believed and concerns about professional repercussions.

Another woman who began messaging with Swalwell about her interest in Democratic politics last year said she met him for drinks and that she was attempting to fend off his advances without hurting potential job opportunities when she began feeling “really fuzzy” and intoxicated, according to CNN. She told the outlet that she ended up in Swalwell’s hotel room without a memory of how she got there.

Social media creator Ally Sammarco said Swalwell sent her unsolicited nude pictures in 2021, when she was 24 years old. Another woman in her 20s, who works in marketing, said the congressman sent her unsolicited videos of his penis.

Swalwell, who is married with three young children, posted a video on Instagram on Friday in which he called the accusations of inappropriate behavior “flat [out] false,” while also acknowledging unspecified poor behavior.

“I don’t suggest to you in any way that I am perfect or that I am a saint,” he said in the video. “I’ve certainly made mistakes in judgment in my past. But those mistakes are between me and my wife. And to her I apologize deeply for putting her in this position.”

Elias Dabaie, an attorney representing Swalwell, sent cease-and-desist letters to at least two people demanding that they stop accusing the congressman of sexual assault, according to CNN. Dabaie was asked by CNN whether the congressman’s comments can be construed as acknowledging that he cheated on his wife, while denying doing anything illegal.

“I’m not going to get into the details of that,” Dabaie said.

Times staff writers Melody Peterson and Gavin Quinton contributed to this report.