SAN DIEGO -- Republicans Thursday asked for an audit of voter registration cards generated in San Diego County by a community organization caught on video giving advice to actors pretending to be a prostitute and pimp in National City.

10News learned that the National City office for the Association of Community Organizations for Reform Now (ACORN) was the target of a hidden camera sting by conservative activists.

In the video, an ACORN employee gives filmmakers -- posing as a pimp and prostitute -- advice on smuggling 12 underage girls across the border from Mexico so they can be put to work in the sex trade. In another portion of the video the employee asks the prostitute how much she charges.

"It is clear it was taken completely out of context. It doesn't reflect at all the conversation. We are going to tell our side of the story, including the ACORN staff member seen in the video," said David Lagstein of ACORN told 10News.

The videos, and others like them, were created by activist filmmaker James O'Keefe and Hannah Giles for BigGovernment.com, a new Web site launched by Andrew Breitbart, a conservative commentator for the Washington Times.

Similar undercover videos were taped at ACORN offices in Baltimore, Brooklyn, Washington, D.C., and San Bernardino. An ACORN employee in Baltimore told the decoys they could claim underage prostitutes from El Salvador as dependents on their tax forms.

The videos prompted Ron Nehring, chairman of the California Republican Party, to send letters Thursday to District Attorney Bonnie Dumanis and Registrar of Voters Deborah Seiler requesting an audit of voter registration cards generated locally by ACORN.

"Recent news stories concerning activities of the ACORN organization in San Diego and elsewhere call into serious question the validity of voter registration activities by this group," Nehring wrote.

"Maintaining the integrity of the elections process demands that each registration card that was solicited or submitted by this organization be thoroughly examined and its validity verified," he said. "In addition, for any card that is deemed fraudulent, it should be determined whether any individual cast a ballot based on that registration card, and appropriate investigations should take place by law enforcement authorities."

Lagstein said he isn't proud of the controversy. "Our goal is to be 100 percent perfect, and we are not," he said.

Lagstein added that the organization as a whole is working to improve. However, some critics have said it is too late.

According to the California Republican Party, ACORN submitted more than 24,000 voter registration cards in San Diego County last year.

Conservative news outlets have tried to link ACORN to President Barack Obama, who was once a community organizer, and claim the group was involved in widespread voter registration fraud leading up to Obama's election.

In the wake of the videos, ACORN fired some employees, and the U.S. Census Bureau decided Friday not to let the organization help with the upcoming census.

Republicans and conservative commentators have called for state and national investigations, and the Democratic-controlled Congress voted Thursday 345-75 to deny all federal funds for ACORN. On Monday, the Senate voted 83-7 to cut off all housing and community grant funding to the group.

The funding cuts will not go into effect until the bills to which they are attached are approved by Congress and signed by the president.

ACORN officials said they are revamping their employee training and plan to launch an independent review of the group's practices.

ACORN stands for Association of Community Organizations for Reform Now.

Last year, it came under fire from Republicans after some of its employees submitted false voter registration forms during the presidential race.

ACORN officials said a handful of employees did so in a bid to boost their pay.

The following is a partial transcript of the video in which one of the National City ACORN workers -- identified as Juan Carlos Vera -- advises filmmakers how to smuggle underage girls from Mexico, as well as inquiring about the price of the services from the woman acting as a prostitute:

Filmmaker: Logistically, I mean, is it better if it's Tijuana, is it better if it's, um, somewhere inland? Where, where is the best place? Um, I'm not quite... there's like all these answers he wants right away.

ACORN Employee: It's better it's in Tijuana.

Filmmaker: Tijuana?

ACORN Employee: Yeah.

Filmmaker: Why?

ACORN Employee: Because I have a lot of contacts in Tijuana.

Filmmaker: OK, and they might be able to assist crossing the border?

ACORN Employee: Yeah.

Filmmaker: OK, there's like 12 of them. Is that okay?

ACORN Employee: 12?

Filmmaker: 12.

Female Filmmaker: 12 girls.

Filmmaker: There's 12 girls but they're like, they're like 13 to 15 years old.

ACORN Employee: Oh yeah?

Filmmaker: Yeah.

ACORN Employee: I want to contact to you only right now for e-mail.

Filmmaker: Got it.

ACORN Employee: How much you charge... (inaudible)

Filmmaker: For her services?

Female Filmmaker: Well, for the entire weekend, I mean... (inaudible)

ACORN Employee: Are you gonna work for me... (inaudible)

Filmmaker: Are you a potential client?

ACORN Employee: No, no, no. I want to know what is it