Buffalo Boy is only a google away. Everyone else is using a smart phone that is easy to disambiguate from commercial tracking sources...so I am sure you could replay all their moves in real time. If you were in the building with a phone... you are toast. https://twitter.com/DCPoliceDept/status/1347223315765727232
So. Each phone is a unique signature. Sure you can turn the tracking off but you are still triangulated by towers. You can buy the tracking data with the ID removed. Then you add the metadata back in. Then go back to where they sleep. Knock Knock. https://lifehacker.com/how-retail-stores-track-you-using-your-smartphone-and-827512308
When every phone has LIDAR, we will all be scanning everyone in 3D all the time. Your covid proximity tracker is an Israeli spy software maker's wet dream. Heres a rogues gallery
https://mpdc.dc.gov/sites/default/files/dc/sites/mpdc/publication/attachments/POIs%20of%20Interest_010821.pdf
https://mpdc.dc.gov/sites/default/files/dc/sites/mpdc/publication/attachments/POIs%20of%20Interest_010821.pdf
You could even combine the protestors live feeds and photos to map the room in 3D and real time. Toss in some voice analyzing for shits and giggles. https://phys.org/news/2015-05-algorithm-combines-videos-unstructured-camera.html
I don't know if Stingrays were deployed due to the sensitive nature of Congressional business and I don't know why they didn't bring the cavalry to seal in the protestors like school shootings and then tag them on the way out. But something was funny. https://www.chicagotribune.com/opinion/commentary/ct-perspec-cellphones-spies-privacy-carter-0410-story.html
So who wants to bet that bugging devices were installed in Nancy Pelosi's office? Perhaps other locations. Passive transmitters that can be remotely excited would be my choice. It's as old as....WW2 Anyone? Anyone?