The 74-year-old suspect told police he met the "patient" on a fetish website for eunuchs.
Five elderly men and an 85-year-old woman face charges for having group sex in public.
"You don't talk to the United States that way, at least under me," Trump says.
During the session, Mr Mallard took on the role of babysitter as well as speaker.
None of the 340 passengers were injured.