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Story highlights

Tillerson isn't leaving, Trump claims on Twitter

Tensions have between Trump and Tillerson have been high for months

(CNN) —  

President Donald Trump on Friday repudiated reports that Secretary of State Rex Tillerson’s days in Foggy Bottom are numbered after days of speculation.

“The media has been speculating that I fired Rex Tillerson or that he would be leaving soon - FAKE NEWS! He’s not leaving and while we disagree on certain subjects, (I call the final shots) we work well together and America is highly respected again!” Trump tweeted, alongside a photo from Tillerson’s swearing-in.

Tensions have been high between Trump and Tillerson for months now, and they were exacerbated after it was reported that Tillerson privately referred to the President as a moron over the summer.

The relationship between White House chief of staff John Kelly and Tillerson soured in recent months following the incident becoming public, leaving the former Exxon CEO without a single top ally in the West Wing as talk has ramped up of him being replaced at the State Department.

Kelly, once Tillerson’s fiercest defender in the West Wing, has stopped defending him privately, leaving him more isolated from the West Wing than ever before, according to a top White House official.

Though Trump knew about the “moron” remark before it was first reported in October, he was enraged after it became public. Their relationship never recovered, and many inside the White House saw their differences as irreconcilable. Trump only offered a tepid response when asked Thursday about rumors of Tillerson’s departure, saying, “He’s here. Rex is here.”

Kelly now agrees with the President that it’s time for Tillerson to go, sources familiar with the relationship told CNN. He first became fed up with him over the moron remark because Kelly, a retired four-star Marine general, saw the comment as insubordination. As one official described it, he has grown weary of trying to defend the indefensible.

The New York Times reported Thursday morning that the plan to replace Tillerson has been developed by Kelly and is likely to be triggered late this year or early next year.

Kelly told the State Department later in the day that rumors Tillerson would be fired were untrue.

“Chief of staff Kelly called our department this morning and said the rumors are not true,” State Department spokeswoman Heather Nauert said Thursday. “He remains the secretary of state. As long as he is serving at the pleasure of the President he will continue to do that job.”

Asked Friday about reports of the White House orchestrating his departure, Tillerson told CNN’s Michelle Kosinski: “It’s laughable.”

But a top Trump administration official said it appears a change is coming for Tillerson, despite what Kelly told the State Department Thursday.

CNN’s Nicole Gaouette and Michelle Kosinski contributed to this report.