I don't know if it's possible to go back and look up a particular post, but it wasn't long after Donald J. Trump took office that I said something along the lines of, "Congratulations, Mr. President. Might I suggest you have The Oval Office swept for bugs left behind by Baraq Obama. Also, clandestine listening devices."
If they were gullible enough to come into the WH and think everything was secure then Trump isn't the wise man I think he is. I'm sure they've done everything possible to sweep that place clean of any and all Barak Obama remnants.