Controversial publisher Judith Regan claims CNN has blackballed her latest author, disgraced journalist Mark Halperin, and spearheaded a campaign to keep him off the airwaves to promote his new book.

“CNN called the other networks to try to force them and shame them from letting Mark on the air. It’s so disgusting. Nobody should be censored. They’ve been calling, saying, ‘Don’t talk to him.’ They’ve been working hard to keep him off air, and it’s unethical. I may send them a legal letter,” Regan told Page Six.

Halperin is hawking his book, “How To Beat Trump.” He’s appeared on podcasts and radio shows, but no major cable networks.

Halperin, a former MSNBC political analyst, lost his job in 2017 after several women accused him of sexual harassment and assault. Halperin’s accusers spoke with CNN’s Oliver Darcy, and news of his comeback book sparked outrage. “The fact that so many people spoke to him sets the whole #MeToo movement back,” accuser Eleanor McManus told Darcy.

For his book, Halperin interviewed more than 75 political strategists, including Donna Brazile, David Axelrod and James Carville. “By answering Halperin’s questions, I did not in any way mean to excuse his past, egregious behavior and, in retrospect, I regret responding at all,” Axelrod explained after the backlash.

Regan claims: “Oliver was on a warpath, trying to make a name for himself … He tried to shame them for giving him a quote. That’s not standing up for women.”

But a CNN insider said, “[Mark] never worked at CNN … I can’t imagine why she would say that. It literally couldn’t be further from the truth.” Still Regan says, “It’s wrong. How can any journalist … try to keep him off air? … Just look at the people CNN put on their air!”

A CNN rep told us, “It would be newsworthy if a network were to book Mark Halperin to appear on their air. Inquiring about that prospect is both an appropriate and responsible practice for a media reporter. That hardly amounts to a pressure campaign.”