And his strategy is playing out exactly as intended.

David Daleiden, founder of the Center for Medical Progress, wanted to ensure the sting videos accusing the women’s health organization of illegally profiting from the sale of fetal tissue had staying power beyond the “contemporary 24-hour news cycle.”

The eight tapes already made public have galvanized the anti-abortion movement and put federal and state funding for Planned Parenthood on the chopping block. Probes of the group are underway in Congress and several states. And conservatives on the Hill are threatening to shut down the federal government if their demand for cuts are ignored.

Daleiden signaled to POLITICO on Tuesday, shortly after the latest tape was posted online, that he has four more videos to release, “give or take” — and he’ll leak them one at a time, perhaps every week, hoping to sustain the political and media firestorm. That schedule would take the controversy right up to the Sept. 30 deadline for Congress to pass a government spending bill.

“For a topic this complex and multilayered, it’s important that each piece of evidence have a chance to be examined individually and so the current presentation format is geared towards that,” Daleiden wrote in an email. The public would never have the attention span to absorb a single, “multiterabyte data dump,” he wrote.

Some had predicted diminishing returns if the shock value of the videos wore off, the group was discredited or the tapes simply stopped coming. But to the consternation of Planned Parenthood and its allies, that has yet to happen despite their insistence that the videos are full of distortions.

The women’s health provider has explicitly denied any illegal activity, saying it legally donates fetal tissue for medical research only after receiving patient consent. In a statement late Tuesday, it castigated CMP’s campaign.

“This is not how you act when you think you’ve caught someone doing something wrong,” said Eric Ferrero, vice president of communications for Planned Parenthood Federation of America. “This is how you act when you have a political agenda and need to invent a reason to attack something the majority of Americans support — in this case, women’s health care.”

Daleiden did not answer questions about whether he’s shown footage to allies in Congress before making a video public but said he is “cooperating with all state and federal investigations into Planned Parenthood’s baby parts sales.”

California tissue procurement company StemExpress, which had worked with Planned Parenthood clinics and is the focus of several videos, released a statement Tuesday calling the Center for Medical Progress “criminals” who continue “to lodge unsupported false accusations.”

CMP’s decision to begin posting the videos in mid-July was not made for a particular strategic reason, according to Daleiden. But the timing has had clear advantages for abortion opponents.

With the 2016 presidential campaign already in full swing, Republican candidates have used the videos to prove their anti-abortion bona fides, repeatedly calling for an end to Planned Parenthood’s taxpayer support. Several governors are highlighting their own efforts to defund the group.

On Tuesday, Texas Sen. Ted Cruz cited the newest video as he rallied ministers to preach against the organization.

The video “has the power to move hearts and minds, even for someone who is pro-choice today,” Cruz told the clergy on a nationwide call. “The videos not only show the face of evil, they also appear to demonstrate an ongoing pattern of criminal conduct at the organization.”

Mallory Quigley, a spokeswoman for the anti-abortion group Susan B. Anthony List, praised CMP’s strategy as “very smart,” saying many of the questions that were posed in the group’s first video have been answered in subsequent tapes.

“The story was too big just to release all of the footage in just one shot,” Quigley said. “When you look at the skyline of the city, it doesn’t tell you the whole history of the city. You’ve got to go in and examine piece by piece what’s happening in all these instances.”

The eight released tapes include secretly recorded comments from executives of Planned Parenthood and StemExpress, undercover footage from clinics, and on-camera interviews with Holly O’Donnell, a former StemExpress employee who worked with Planned Parenthood clinics in northern California. Three videos include scenes of fetal tissue being handled by workers in clinics.

The first two videos feature two key Planned Parenthood executives as they discuss supplying fetal tissue or, as CMP claims, negotiating prices for specimens.

The third, fourth and fifth videos show footage of fetal tissue from aborted pregnancies.

O’Donnell appears in a total of three videos, the latest of which aired on Aug. 19, raising allegations against both Planned Parenthood and StemExpress. Speaking directly to the camera, she alleges that she cut open an aborted fetus to procure the brain, watched StemExpress obtain an intact aborted fetus and saw coworkers collect fetal tissue even though patients had not given consent.

Daleiden, who said he first reached out to O’Donnell via social media in the fall of 2013, said the concept of a series relying on her came up about a year ago.

“One of the most incredible things about first meeting Holly was how much her personal experiences harvesting fetal tissue inside Planned Parenthood corroborated what we learned from [Planned Parenthood] doctors and executives themselves, so I wanted to have a way to put those two sources in dialogue with each other,” he wrote in his email to POLITICO.

StemExpress CEO Cate Dyer is the main focus of the eighth video, discussing the strong demand for fetal liver tissue during a secretly filmed meeting on May 22 with CMP activists posing as employees of a fictitious tissue procurement company.

“CMP’s and Daleiden’s continued lies reflect a sad attempt to malign StemExpress and me personally,” Dyer said in a statement.

It’s too soon to say whether the sting videos will be effective in damaging Planned Parenthood in the long run, says Chris Jackson, an Ipsos Public Affairs pollster who recently examined Americans’ attitudes toward the organization. The poll still found strong support for federal funding of its work.

While the videos have been a hit for Planned Parenthood’s reputation, once they stop, public opinion “will probably drift back up to where it’s been,” Jackson said. The CMP is “getting a small population really fired up but isn’t really changing things on a national scale.”

Brianna Ehley contributed to this report.