What makes you think SS guys aren't carrying guns?
you're misreading something, because I never meant to suggest that the President's detail was noot armed. On the contrary, they will have both handguns and heavier fire power, something like Uzis, concealed on them.
I am, however suggesting that a very visible, fully equipped, Marine platoon with a full combat load out on display would have a sobering effect on any opportunists. No one would get in a shoving match with them without it starting a firefight.
sorry for any confusion.