It used to be easy to sweep for bugs, but I don’t know if the latest tech has made it any harder. IT/wireless communication security might be a bigger issue if there’s a mole at NSA.
My thought
Obama replaced ALL of the computers in WH. I suspect more than one can be controlled to listen in from elsewhere.
Like the voting machines that can be controlled by cell phone (actually witnessed before it was decertified in our state) the new machines are deviously used.