Graffiti reading “Vote Arce Ya Cunts” appeared this weekend sprayed on the campaign headquarters of Hillary Ronen, the chief of staff for Supervisor David Campos and one of four candidates vying to replace him.

“This type of campaigning and bullying makes me want to work harder,” Ronen said of the vandalism and its apparent support for her opponent, Joshua Arce. “Not just me, but my all-female staff, we are not gonna back down to bullies.”

The message was scrawled in black on the door to Ronen’s campaign office at 3417 Mission St. between Eugenia Avenue and Kingston Street on Sunday night, Ronen said. Her staff found the message on Labor Day, Ronen said, and promptly painted it over.

On Tuesday, Ronen said that while she did not believe Arce was personally responsible for the vandalism, but said his campaign style was setting a tone that “leads to this kind of attack against me.”

“He is running a campaign using very divisive and inflammatory rhetoric,” she said. “I think that has real repercussions.”

Arce was quick to issue a message on Facebook denouncing the graffiti and distancing himself from “someone, who claims to support me, [who] uses hateful language and defaces private property.”

Arce texted Ronen offering to help clean the graffiti, and she texted him back asking him to pledge “to stop the negative campaigning” and to focus on policy, according to screenshots of the exchange. Ronen said Arce is “blaming [her] for displacement and homelessness” instead of offering solutions, leading to personal attacks against her.

On Tuesday, Arce countered, saying he has run a campaign “based on experience, track record, and policy ideas” and that voters have “the sense that the status quo on District 9 has failed.”

He has criticized Ronen and Campos’s records on housing creation in the past — just 455 units of affordable housing have been approved in the last decade in the neighborhood — and has said the current supervisorial administration has not done enough to address the affordability crisis in the Mission District.

Officer Giselle Talkoff, a police spokesperson, said a report on the graffiti had been received by the Police Department and that the incident would be assigned to investigators. They would look to see if any video footage of the spraying exists, she said. The vandalism could be either a felony or misdemeanor, depending on the amount of graffiti investigators find, she added.

The news site 48 Hills first reported the vandalism on Monday.