Speaking to The Telegraph, Morgan said that Trump almost pulled out of the "Piers Morgan Uncensored" interview for TalkTV eight minutes before it began because he was enraged by the three-page document.
The document contained Morgan's criticisms of Trump over the years, per The Telegraph, and included a description of the former president as a "supreme narcissist." Morgan had also criticized Trump's refusal to accept defeat in the 2020 presidential election, Insider's Tom Porter reported.
The "dossier of criticisms," as Morgan has referred to it on Twitter, was compiled by Farage, Morgan claims.
Morgan first said Farage had stitched him up on Friday morning in a tweet, accusing him of a "pathetic attempt to ruin" the Trump interview. "Especially graceless after I congratulated you after yours," Morgan wrote.
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Farage, who rose to prominence as the leader of the Brexit movement, hosts a talk show on rival network GB News. He interviewed Trump in December.
The document reached Trump after Farage handed it to Trump Jr. during a visit to Mar-a-Lago a few days earlier, The Telegraph reported. Farage did not respond to Insider's request for comment.
After weeks of planning, Morgan said that he was nervous that the dossier would bring the interview to an end before it had even started.
"I thought he was going to cancel the interview," he said, per The Telegraph. "He was very angry. I'd never seen him like that. But then he pulled himself together and did the interview."
The interview, which will be broadcast on Monday, included an "incredibly fractious series of exchanges" about Trump's claims that the 2020 presidential election was stolen, Morgan said.
TalkTV is a new British television channel operated by News UK, owned by the media mogul Rupert Murdoch.
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