In an interview with Fox News' Bret Baier that aired Sunday, Baier asked Trump why he called the former U.N. ambassador "Nimbra" -- a butchering of her birth name -- in a social media post on Friday. Trump also called her "Nikki 'Nimrada' Haley" in a social media post last week.

"I do that with a lot of people, like Hutchinson. I mean, he was polling at zero for about one year, and I called him rather than Asa, I called him Ada Hutchinson, and it just felt good to me," Trump told Baier. "And with her, it's just something that came. It's a little bit of a takeoff on her name. You know, her name, wherever she may come from."