Probably an Al Haig type of announcement.
That’s what I was thinking! Al Haig Alert!
which BTW was an unfairly portrayed, but unfortunate statement. It is usual in a time of crisis, disaster, upset, for the senior military officer present - be he a General or a corporal - to state that I am in charge [unstated until relieved by a more senior person or the regularly appointed watch officer, duty officer] and this is the situation. It's how the military works. It is not an assumption of unauthorized authority. It is simply an acceptance of the responsibilities that fall upon the senior person present when things are going amiss.
“Probably an Al Haig type of announcement.”
That is exactly what I was thinking. He will announce that Jeff Sessions is zombified and is recusing himself from life itself. Rosenstein will say he is in charge here.