Trump: "I've done nothing wrong."

[Justice matters.]

31. It's up to the Judge in certain conditions (protecting witnesses is one).

1990
When Can the Courtroom Be Closed in Criminal Proceedings?
Frederick W. Goundry III

The sixth amendment provides that "in all criminal prosecutions, the accused shall enjoy the right to a ... public trial .... "1 At the same time, the public and the press, under the first amendment, have a right to open criminal proceedings, including pretrial suppression hearings, voir dire, and the trial itself.2

The right to an open trial is, however, not absolute - the trial judge has some
discretion on whether to close the courtroom to the public and press.3

Closure of the courtroom has been held to be proper to protect witnesses,4 to preserve order in the court's and to avoid prejudice to either party.6

It's a PDF: https://scholarworks.law.ubalt.edu/cgi/viewcontent.cgi?article=1577&context=lf