SAN DIEGO--Now, 10 days into a crisis over sexual harassment allegations, San Diego Mayor Bob Filner has dug in for a fight, maybe in the courts, maybe against a recall movement.

Filner has been accused of sexually harassing staff members and constituents, groping, grabbing, forcibly kissing, making lewd comments and making himself a "threat to all women."

The 70-year-old Democrat apologized for his misbehavior toward women and promised to seek professional care, although he denied that his conduct was sexual harassment. He also refused a demand from three ex-supporters and several high-ranking members of his party that he resign.

San Diego, no stranger to political controversy at City Hall, is in a kind of a limbo: No claims or lawsuits have been filed, but the mayor, once a ubiquitous presence at community events, has largely dropped from public view, shunning the media that he once courted.

Late Friday, the county Sheriff’s Department opened a telephone hotline for anyone who wants to report sexual misconduct by Filner.

Filner has hired a top employment lawyer to fend off any claim or lawsuit and has rearranged his top staff to assure the public that the mayor's office is still open for business.

A group of supporters has vowed to fight any recall, arguing that the mayor — long a champion of civil liberties — is being denied due process. The battle could devolve into a fight between activists from blue-collar neighborhoods south of Interstate 8 versus those from more affluent neighborhoods north of the freeway that is the traditional dividing line of San Diego politics.

"You might as well get ready: we're not going anywhere and he's not going anywhere," retired social worker Kathleen Harmon told a pro-Filner rally outside City Hall on Thursday night.

The city has a well-defined process for handling such claims within 45 days, either settling with the alleged victim or permitting him or her to file a lawsuit.

But if the person named in the claim is the mayor, the situation grows complex, officials said. They pointed out, for example, that city rules allow the mayor or department heads answerable to him to settle many claims under $50,000.

Would the mayor have to relinquish that authority? And should the city pay for an outside lawyer, as it did to the tune of millions of dollars for council members and bureaucrats ensnared in two other scandals in recent history?

Or are the allegations so outrageous, so "outside the scope" of his official duties, that the city has no responsibility to pay for lawyers to defend him?

"Legally, it's a mess," said Christopher Morris, who spent 15 years in the city attorney's office and is now in private practice.

Republicans on the City Council have called on Filner to resign, as have two of the Democrats.

"I used to sell insurance policies for this type of thing and I've seen companies brought to their knees by one allegation of sexual misconduct or harassment," said Councilman Scott Sherman, a newly elected Republican.

To mount a recall, the anti-Filner side would probably have to hire people to gather the 101,000 signatures of registered voters necessary to put the issue on the ballot. But such an effort would be expensive and might fail, experts cautioned.

"Qualifying a citywide recall and being successful at recalling the mayor is highly unlikely," said Chris Crotty, a nonaligned political consultant.

Bob Glaser, another nonaligned political consultant, agreed that a recall is difficult but added: "Anger [at Filner] is higher than I have ever seen it regarding an elected official.... But no one is ready to go out front and lead on the issue."

Former Councilwoman Donna Frye and attorneys Marco Gonzalez and Cory Briggs — the former Filner supporters who brought the accusations to the public — have sought to shield the alleged victims from the media spotlight.

They have described the allegations but refused to provide names.

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tony.perry@latimes.com