I’m guessing that it must be a terrible thing to be so afraid of the American people, as their President, that you have to ban private planes from flying around you, ban people from gathering around you, ban traffic from driving around you. What is he afraid of?
“What is he afraid of?”
A prudent military would be sporting a protection system whose aircraft sport a sustained stall speed equivalent to that of a Cessna, etc. You can bet there were other assets around to take care of business.
It’s standard practice to have a Temporary Flight Restriction when the President is somewhere.