Unlikely. Otherwise an assassin could distract the Secret Service by having a few openly armed people wandering around while the assassin stays concealed. They'll just make sure he stays out of the restricted perimeter.
I bet the SS hates these little charades when Obama decides he wants to get all folksy, mingle with the common man, and copy what mainstream America is doing. It probably is a nightmare for them to have to be among the smelly masses like us so that B.O. can have his little parade. Since average Joe goes out for a burger, he has to do the same. If they show up at townhalls, he gets that “me too” attitude and stages one for himself. I’d love to know who the Einsteins are who advise him. He’s always a day late and a dollar short.