Secretary of State Rex Tillerson is at odds with the US ambassador to the United Nations Nikki Haley, adding to the drama of what has already been a tumultuous week for the top US diplomat, according to a New Yorker report on Friday.

“Rex hates her,” a senior US official said about Tillerson’s feelings toward Haley. “He f—— hates her.”

The official made that comment after suggesting Haley proved to be “the most effective diplomat” in the simmering rift between the US and North Korea over that country’s missile program.