The word spread around after author Michael Wolff suggested in an interview that Trump was romantically involved with Haley, who was positioning herself as the US President's heir-apparent.

Squashing the claim, Haley told Politico's Women Rule podcast on Thursday that, "It is absolutely not true. It is highly offensive, and it's disgusting."

She also said that despite Wolff's claim that she was spending a lot of private time with Trump, the US diplomat has been on the Air Force One only once.

"I have literally been on Air Force One once and there were several people in the room when I was there," Haley said. "He says that I've been talking a lot with the president in the Oval about my political future. I've never talked once to the president about my future and I am never alone with him."

Haley also slammed Wolff as a man who feels uneasy with strong-willed woman.

"Most men respect women but there is a small group of men, that if you just do your job and you try and do it well and you are outspoken about it, they resent it. And they think the only option is to bring you down," she said.