Epstein had guards as well. As I recall they went on a unscheduled break or "fell asleep".
Pretty sure secret service is just as corrupted as every other part of government.
I hope they wouldn't be stupid enough to try it. Though they've been proving me wrong on that front on a regular basis.
Killing the first Grachi brother did not stop the populares neither did killing the second.
If they kill him they just ensure that a century hence he will have statues and be remembered foundly and heroically.