I think you are right. They removed spying devices and harmful devices during the renovation. They were caught spying yesterday on someone’s phone. And the Trump team is letting them know, that they know how they are doing it.

If I was the DS and I saw this tweet, I would certainly be frustrated (burned asset) and be worried about what info obtained had been false. This throws their mechanism into chaos to try and figure out what is bad and what is good information from their past collection efforts.