Those are the VIP escorts, busy with politicos these days as well as the POTUS.
And welcome to RR.
Steve
Thanks. I also, heard them say "Border King" tonight. What kind of CHP officers are those and what do they do in the field?
The times I have heard it used, it was the escort units that hpycmpr described. They report when they reach various checkpoints during the escort. When the OP said "call out", I believe he only meant that they say "Guardian" when they call the units on the air, rather than meaning that someone was requesting a business or service named "Guardian".