Perhaps an algorithm could track his daily movement solely within the White House by analyzing a combination of inaudible sound wave reflection/refractions [0]

Perhaps an algorithm could track his daily movement solely within the White House by analyzing a combination of inaudible sound wave reflection/refractions [0] and still images for context. [0] https://motherboard.vice.com/en_us/article/53d3da/guoguo-is-a-new-indoor-smart-phone-localization-acoustic-gps https://motherboard.vice.com/en_us/article/53d3da/guoguo-is-...