All tele communications of American politicians or wanna be politicians is recorded, its not an if or a maybe but a core and primary function of Pinegap here in Australia. Using an unlisted or different phone, doesn't mean you get away with it, just become more of a target.
The difficulty is getting military surveillance into an Civil court.
Snowden explained this.. I guess no one was listening
https://www.theguardian.com/world/20...inary-citizens
https://en.wikipedia.org/wiki/ECHELON
"Congressional investigators determined that "targeting of U.S. political figures would not occur by accident, but was designed into the system from the start."
then this..
https://www.nytimes.com/2017/02/16/u...essel-usa.html