What's with the Secret Service?

What's with the Secret Service? Not my young self's idea of the self-sacrificing heroes. Corrupted by years of being forced to protect fiends and traitors? Good ones weeded out by corrupt culture or, like the military, forced out by dictatorial political edict? Just plain degenerated like the rest of the gaga twerking populace?

What a dilemma a good man is in to pledge his life to protect a tyrant bent on destroying the foundations of the nation. Oaths in conflict.