In Don McGahn defies subpoena as Trump clash with Congress intensifies, the Guardian raises that:
The House judiciary committee held a brief hearing on Tuesday morning in McGahn’s absence, with an empty chair where he was supposed to sit.
Is there any point in such theatricals beyond showcasing on CSPAN that McGahn didn't show up? Is there anything else to it (if so please provide data or at the very least put an excellent argument forward)? Or is it strictly about political theatrics (if so, likewise put an excellent argument forward as to why/how that is useful)?