5 Dec 2016 4:08 pm
In mid November Ben Carson's business manager and close friend Armstrong Williams said Carson won't join the incoming Trump administration and would only serve as an unofficial adviser.
Williams said, "Dr. Carson feels he has no government experience, he's never run a federal agency.
The last thing he would want to do was take a position that could cripple the presidency."
So what has changed in the last three weeks?