US Defense Secretary Jim Mattis said on Tuesday that he'll remain on Donald Trump's team.
"I'm on his team. We have never talked about me leaving," he told reporters as he flew from Washington to Ho Chi Minh City at the start of his Asia trip.
"We just continue doing our job," Mattis added.
"He said, 'I'm 100 percent with you'," Mattis quoted Trump as saying during their phone conversation on Monday morning.
Earlier, in an interview with CBS, Trump said that while he does not know if Secretary of Defense James Mattis is going to step down, "it could be that he is."
The relationship between Trump and Mattis entered the media spotlight after the release of journalist Bob Woodward's book on the Trump administration last month, which portrayed a fictional Mattis privately belittling Donald Trump when speaking to associates.
Jim Mattis denied making any such remarks. He characterized Woodward's book as a "product of a rich imagination."