dudes like described in the OP make me more nervous than anyone. Extreme Insecurity + extreme lack of training = the Dunning-Kruger version of someone desperate to prove how badass they are.
If they feel better with 3 guns, go for it. If they were guarding me, in these days, I would want him to have 5 guns and a 50 cal across his arms.
Being an elected official. Particularly the Sec, of State, you're a target for some nut. I think I'd shake the security guards hand, if I could, for keeping his charge safe as well as himself.
My opinion