It’s no octo-secret that everywhere that Potus goes there also goes electronic countermeasures:
https://en.wikipedia.org/wiki/USSS_Electronic_Countermeasures_Suburban
The barrage jammers should be very effective against 2.4 GHz wireless stuff like Bluetooth and wi-fi, but they also have jammers specific to those services. IEDs, missiles, and drones pose a much more serious threat than an old man with a bug in his ear ;-)
https://www.politico.com/magazine/story/2015/01/the-secret-service-is-jamminsort-of-114647
#484 shouldn’t be hard to figure out what freq they use. Just slow roll the freq jamming across the spectrum. When hiden rolls his head to the side like a dog before howling at a siren youll know you hit it
Bob, thanks for posting. Good to know!