The retired four-star general and former Homeland Security director tried to bring order to the White House, but he and the president are said to have grown tired of one other in recent weeks. The president often remarks on Kelly's lack of political skills and has told advisers in recent days that he needs a more political chief of staff for his re-election.
Kelly started holding increasingly fewer senior staff meetings - once daily occurrences were whittled down to weekly gatherings - and began to exert less control over who talks to the President. Lights are off in Kelly's office this morning, per a senior admin official.
Most of Mueller's other interviewees were part of the Trump election campaign or presidential transition.
At times, Kelly was the source of his own downfall.
The officials confirmed the decision Friday on condition of anonymity because it had not been announced.
Trump insisted he will have a swift and comprehensive rebuttal to Mueller's findings into collusion between his 2016 presidential election campaign and Russian Federation - even though no details of the report's contents have been leaked.