The author of an explosive expose on the Trump administration has walked off the TODAY show mid-interview after a quizzing over his claims Donald Trump is having an affair.

Author and journalist Michael Wolff, who released bestselling book ‘Fire and Fury: Inside the Trump Whitehouse’ last year, appeared on the TODAY show this morning.

The interview began with questions over Prime Minister Malcolm Turnbull’s recent visit to the United States and the Whitehouse’s position on gun crime.

But almost five minutes in to the interview, when presenter Fordham questioned Mr Wolff about his claims that President Donald Trump was “absolutely” having an affair, the ‘Fire and Fury’ author started complaining of technical problems.

Fordham launched into the grilling with: “You said during a TV interview just last month that you are ‘absolutely sure’ that Donald Trump is currently having an affair while President behind the back of the First Lady, and I repeat you said you were ‘absolutely sure’.”

The controversial American journalist and author became flustered when Fordham questioned him over his allegations Trump is having an affair. (TODAY)

In Wolff's international best seller 'Fire and Fury', former Whitehouse adviser Steve Bannon brutally attacks Trump and his entourage. (AAP)

A concerned-looking Mr Wolff attempted to interrupt, saying “hold on, hold on” as Fordham ploughed on with his question.

“Just last week however you backflipped and said I quote ‘I do not know if the President is having an affair’. Do you owe the President and the First Lady an apology, Mr Wolff?”

“I can’t hear you,” Mr Wolff responded. “Hello?”

When Fordham repeated asked “You’re not hearing me Mr Wolff?”, the author was heard responding “no” before saying “I’m not getting anything”.

After saying he "couldn't hear" Fordham, Mr Wolff took off his earpiece and walked off set. (TODAY)

The US President attempted to prevent the release of Mr Wolff's explosive book. (AAP)

As the author removed his earpiece and stood up to leave his London studio, a stunned Fordham observed “it looks like the interview may be over”.

“Gee, that was an unfortunate question to miss wasn’t it?” observed fellow presenter Georgie Gardner wryly as Mr Wolff walked off set.

“I think he might have heard it,” Fordham responded.

The American journalist has copped heavy criticism after he strongly implied the President was having an affair with the married US Ambassador to the United Nations, Nikki Haley, during an interview he gave in Amsterdam in January.

Mr Wolff said he was "absolutely certain" and only missed the "blue dress" to prove it - a reference to Bill Clinton's semen stains allegedly found on Monica Lewinsky's clothing.

“Gee, that was an unfortunate question to miss wasn’t it?” TODAY presenter Georgie Gardner observed. (TODAY)

President Trump has previously slammed claims made in ‘Fire and Fury’, which include claims of a chaotic campaign which the President didn’t want or expect to win; that he was using the Presidential run as a platform to launch a cable news network; and that “100% of the people around him” in the Whitehouse believe he is unfit for office.