Former United Nations Ambassador Nikki Haley defended President Trump as "truthful" and said she never questioned the president's fitness for office during a combative interview with Today's Savannah Guthrie.

Haley, 47, has been defending the president on her media tour to promote her new book, With All Due Respect: Defending America with Grit and Grace, which was published on Tuesday.

"I am way over time, but let me just quickly, because it’s been out there and you worked in this administration. Did you ever have any doubt about the fitness of this president?" Guthrie asked Tuesday morning.

Haley, who alleged former chief of staff John Kelly and former Secretary of State Rex Tillerson had tried to usurp the president, responded, "I never did," adding that she never doubted his mental acuity.

Guthrie proceeded to ask about the president's "truthfulness."

"Savannah, I talked to him multiple times, and when I had issues, he always heard me out. I never had any concern on whether he could handle the job, ever," the former U.N. ambassador countered.

When Guthrie pressed on, Haley added, "Yes, in every instance that I dealt with him, he was truthful, he listened, and he was great to work with."

The president had made more than 13,000 false or misleading claims as of his 1,000th day in office last month, according to the Washington Post’s fact-checker.