Lindsey Graham warns he'll "call in the FBI" if one witness is questioned in Trump impeachment trial

[ancianita]

63. Except for one thing: he has no standing. He cannot interfere with House managers' prosecution.

He's just a juror, and must only swear:

"Do you solemnly swear that in all things appertaining to the trial of the impeachment of Donald John Trump, president of the United States, now pending, you will do impartial justice according to the Constitution and laws, so help you god?"

And the Sergeant-at-Arms says every day:

“Hear ye! Hear ye! Hear ye! All persons are commanded to keep silence, on pain of imprisonment.”

Senators are required to stay silent throughout the trial while they serve out their role as jurors. They must also leave their cellphones — and coffee — outside the chamber. Pen and paper are their only distractions. They can speak while making motions during the trial. Others can also step outside the chamber and offer as many comments to the press as they’d like, as we know they will.

Sure, he can scream to the press for the FBI to come in, but he's got no standing.
No jury person ever yells to the public that they can tell the prosecution or defense how to run their trial, who they want to hear from, or what to do. We'll see if he disrespects Leahy during the trial, and what Leahy does. Maybe he and enough other senators can get kicked out so that there can be a 2/3 conviction vote.