In the article linked from Drudge's headline, it says that Bannon was on the committee as a check against Michael Flynn. He's gone now. Bannon only attended one meeting, and felt he wasn't needed in that role anymore since H.R. McMaster was chosen as National Security Advisor. Bannon wanted McMaster in the role, and McMaster was given the authority to reorganize the committee, which he has. I see Drudge is saying Rick Perry will fill Bannon's place.
Of course the press is going to make a big to-do about it. No matter what happens in this White House, the media is going to make it look like it's because of tension, bad feelings, power struggle, yada, yada, yada.
Rick Perry is because of Energy Dept.
Good shake up , eye on Target and USA interest only.
Why would Trump nominate Flynn but trust him so little as to put a babysitter with him? Frankly, if that spin is true, it's way more disturbing than "you know what, I made a mistake. Bannon doesn't belong there."