I have no idea whatsoever, which is almost certainly as much an idea as you do.
The trial is examining Trump’s later defamation of Carroll, which he has continued to do in the court room, while Carroll is on the witness stand giving her testimony, and significantly in earshot of the jury.
The jury gets to decide if Trump defamed Carroll, the same jury that have witnessed him do exactly that in the court room.
Tell us again how Trump is getting away with it all.