Bruce Turkel, an entrepreneur and author, says he will no longer be a guest on Fox News or Fox Business because of their coverage of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's "zero tolerance" immigration policy.

In an open letter posted on his LinkedIn page, Turkel, a regular guest on Fox Business who has also appeared on Fox News, said its "heinous" coverage of the separation of migrant families is the reason he won't appear on the shows in the future.

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"Your network has been very very good to me. The 400 plus appearances I've made on Fox News and Fox Business have helped me generate lots of keynote speaking appearances and helped me sell a bunch of books," Turkel writes. "All of that being said, I also have to say I can no longer appear on the Fox network. I quit."

While Turkel was more often a guest on Fox Business than on Fox News, he writes in his letter that the affiliation with Fox News hosts' comments on President Trump's immigration policy was a reason he was leaving.

He specifically cites Ann Coulter's "child actors" comment and Sean Hannity's "rolling invasion" comment on child separation as examples of poor coverage by Fox News.

"Accepting that this misguided policy is wrong doesn’t depend on which side of the political aisle you’re on," he continued. "It doesn’t matter if you support immigration and immigrants or if you don’t. And it doesn’t matter if you believe the law — or the Bible — gives our government the right to do what they’re doing or not."

Turkel wasn't paid for his appearances, meaning he only loses out on exposure he received from the show during guest appearances.

He said past controversies at the network were not as bad as its coverage of the "zero tolerance" policy.

"That was before you decided that separating innocent children from their parents was an acceptable practice," Turkel wrote.

Fox News did not immediately return a request for comment.

According to The Miami Herald, which first reported on Turkel's departure, Turkel is a Democrat who is locally known for running the ad agency behind multiple Miami tourism campaigns.

Turkel isn't the only person to call out the network for its coverage on the issue. Hollywood film producer Judd Apatow, "Modern Family" co-creator Steve Levitan and comedian Seth MacFarlane have all denounced the network for the same reason.

The Trump administration announced its "zero tolerance" policy earlier this year, saying the Department of Justice would criminally prosecute all adults attempting to illegally cross the southern border into the U.S. As a result, families who crossed together would in some cases be separated.

Updated at 9:40 p.m.