from The Conservative Treehouse:

For the sake of this argument, if you wanted to align with Judge Chutkan on the need for a gag order, you would first need to clarify if Mark Meadows was a witness for the Jack Smith prosecution.  Absent an actual witness list, the remarks by President Trump have to be stretched to encompass potential witnesses or foreseeable witnesses.  That’s what Judge Chutkan decided.  Anyone who might be a witness is protected by the gag order forbidding President Trump from talking about them.