Chief U.S. District Judge Vaughn Walker said Wednesday he wants to TV cameras to cover a Jan. 6 pretrial hearing as a test run to determine if a trial of Prop. 8 should be televised, AP reports. Sponsors of Prop. 8 the ballot measure that banned same-sex in California say that television coverage of the trial in San Francisco would result in harassment and intimidation of witnesses and other participants. Newspapers and TV networks have asked Chief U.S. District Judge Vaughn Walker to allow cameras in the courtroom for the trial next month. The federal courts are experimenting with allowing television coverage in cases without juries. The Prop. 8 case will be decided by a judge without a jury. [More from the Chronicle, Mercury News]