then if Trump insists those not testing negative be allowed in the hall -
you have a good reason to cancel or Zoom it.
Otherwise not
You do not seem to understand how quarantine works. You are not released from quarantine with a negative test, because it is not uncommon for a negative test to happen before someone becomes contagious. It requires negative tests over time. With the disease continuing to swirl around the trump team, and many of them refusing to quarantine, it will be a long time before they are out of the woods.