They should try a sting in the Oval Office, with just 2-3 people.
“We’ve got to sack Jared, OK?”
“Who thinks Melania is getting fat?”
See if it gets out.
Didn’t one of the aspirants to the throne do something like that on Game of Thrones: give three suspect followers different messages to see who the squealer was?
Or maybe it was ‘Different Strokes’.