Writing in his column for the Daily Mail, the 55-year-old said he refused to say sorry because he believes in ‘freedom of speech’.
He said: “ITV’s Director of Television rang to say we were now ‘on the cliff edge’ and either I apologised or I would have to leave GMB.
“One [friend] thought I should just apologise, take the hit and move on. The other was emphatic: don’t apologise.”
Morgan caused outrage when he claimed he ‘didn’t believe a word’ of Meghan’s tell-all interview with Oprah Winfrey.
In the chat, the Duchess of Sussex revealed that she had suicidal thoughts when she was a Senior Royal.
She said: “Look, I was really ashamed to have to say at the time and ashamed to have to admit it to Harry especially. But I knew that if I didn’t say that I would do it.”
She then added: “I just didn’t want to be alive anymore.”
However, Morgan has insinuated that the mum-of-one was lying.
He added in his column: “I should be allowed not to believe someone, and to say that I don’t believe them. That, surely, is the very essence of freedom of speech?
“If I said I now believed Meghan, I would be lying to the audience, the very thing I’ve accused her of doing.
“I called Kevin back, said I wouldn’t be apologising. We agreed I’d leave GMB with immediate effect.”