Contrary to Haley's claims, he told the New York Times on Monday that "at no time did I, nor to my direct knowledge did anyone else serving along with me, take any actions to undermine the president."
He also appeared to take a shot at Haley, who served as the U.S. ambassador to the United Nations for the Trump administration, by further claiming she was rarely present at meetings.
"Ambassador Haley was rarely a participant in my many meetings and is not in a position to know what I may or may not have said to the president," Tillerson said.
Haley made the accusations in new book, "With All Due Respect," according to the Washington Post. She included former White House chief of staff John Kelly among those undermining the president.
"Kelly and Tillerson confided in me that when they resisted the president, they weren't being insubordinate, they were trying to save the country," she wrote.
Haley said she resisted their efforts to have her join their resistance to the president from within his administration.
Here's more about Haley's accusations:
Haley claims Kelly, Tillerson worked to resist Trump l ABC Newswww.youtube.com