The special counsel's team questioned Kelly specifically on an episode involving Trump after the New York Times reported that past year Trump sought to fire Mueller - a report that allegedly drew Trump's ire at then-White House counsel Don McGahn, who didn't publicly deny it.
Task & Purpose contacted several officials at the Defense Department and military services, but none of them had been informed about Trump's pending announcement.
West Wing officials widely believe that chief of staff John Kelly's departure is imminent and that Nick Ayers, chief of staff to Vice President Pence, will replace him. But he has a number of detractors who have been trying to convince the president he'd be a disaster.
Trump is actively discussing a replacement plan, though a person involved in the process said nothing is final right now and ultimately nothing is final until Trump announces it.
Australian scientists develop '10-minute' cancer test
Dr Carrascosa said that the test had been trialled on 200 tissue samples, detecting cancer with up to 90 per cent accuracy. Sign up today to get biotech news and updates delivered to your inbox and read on the go.
Sources tell CNN that "Kelly responded to a narrow set of questions from special counsel investigators after White House lawyers initially objected to Mueller's request to do the interview earlier this summer".
Kelly was not at the White House on Friday, but was expected to attend an East Room dinner with the president and senior staff. It is true that there is little chemistry remaining between the two men, the people said - even though Trump only months ago asked Kelly to stay on through 2020, and the general agreed.
Kelly's tenure working for Trump was pocked with controversies, and officials were often amazed at how he managed to survive.