As our conversation continued the DAG proposed that he could potentially wear a recording device into the Oval Office to collect additional evidence on the President's true intentions. He said he thought this might be possible because he was not searched when he entered the White House. I told him that I would discuss the opportunity with my investigative team and get back to him.
https://www.judicialwatch.org/wp-content/uploads/2019/09/JW-v-DOJ-McCabe-Rosenstein-memo-00388.pdf