Cars.com, Casper, and others have pulled their ads in light of Sean Hannity pushing a conspiracy theory surrounding the death of a DNC staffer.

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Cars.com, Casper, and several other companies pulled advertising from Sean Hannity's Fox News program Wednesday as the host continued to push a conspiracy theory about Seth Rich, the Democratic National Committee staffer who was killed in Washington, DC, last year.

For days, Hannity has been peddling a theory that Rich's killing was ordered by the Clintons in retaliation for leaking DNC emails to WikiLeaks. Police have said his death was the result of a robbery gone wrong. "Cars.com's media buy strategies are designed to reach as many consumers as possible across a wide spectrum of media channels," a Cars.com spokesperson said in a statement to BuzzFeed News when asked about Hannity's focus on the conspiracy. "The fact that we advertise on a particular program doesn't mean that we agree or disagree, or support or oppose, the content. We don't have the ability to influence content at the time we make our advertising purchase. In this case, we've been watching closely and have recently made the decision to pull our advertising from Hannity," the company added.

After learning its commercials ran on Hannity's show, Crowne Plaza Hotels said it terminated its relationship with its third-party ad-buying agency. "We do not advertise on Fox News, Hannity or any political commentary show. We have a specific do not advertise list for this type of programming. Unfortunately, our expectation to adhere to this list was not met by a third-party agency. Since we learned of the airings, we addressed the issue immediately and terminated our relationship with the agency. We have no plans to advertise on Fox News for the foreseeable future," the company explained.

Ring, a video doorbell company, and Peloton, a cycling studio, announced that they had directed their media agencies to stop advertising on the show. Mattress companies Casper and Leesa Sleep also said Wednesday that they had pulled ad buys from the show. Casper said it was "reassigning the allocation."

@_elissa_johnson @naretevduorp @seanhannity @FoxNews We directed our media agency to stop advertising on Sean Hanni… https://t.co/crsuA1hBwM

In response to a customer on Twitter, USAA, a financial service for the military community, said it pulled its commercials off Hannity because it was an "opinion show."

The decisions came after Rich's brother sent a letter to Hannity's executive producer pleading for the show to stop spreading rumors about Rich's death. On Tuesday, Fox News retracted a story tying Rich to Wikileaks and wrote in a statement, "The article was not initially subjected to the high degree of editorial scrutiny we require from all our reporting."

On his show Tuesday night, Hannity said he would stop talking about the conspiracy theory "for now," but later implied he would address it again. "Please do not interpret what I'm saying tonight to mean anything. Don't read into this," Hannity told viewers. "I promise you I'm not going to stop doing my job. To the extent of my ability, I am not going to stop trying to find the truth."

A spokesperson for Fox News did not immediately respond to a request for comment.

Ok TO BE CLEAR, I am closer to the TRUTH than ever. Not only am I not stopping, I am working harder. Updates when available. Stay tuned!