How are Secret Service agents so neutral?

I can't figure them out. Apparently they don't have opinions or don't care whether a Democrat or Republican is elected. I doubt if they even vote. They are loyal. You never hear of one telling on anything a President does that would be questionable. Now one went to Fox (that means he was most likely a source for Fox when he was working), and one wrote a book about Hillary. I am not sure how they get hired. I assume law enforcement or military back ground , never voted, and have no political stance. They probably have a wide knowledge of guns and weapons.

How are Secret Service agents so neutral?
They are really robots
They are so busy , they don't think about politics
They are only concerned about their jobs and pension
Select gender and age to cast your vote:
How are Secret Service agents so neutral?
Post Opinion