It would make 0 sense for the most hated President (by some) to go walking around in public in a huge crowd. It is absolutely necessary for his safety that he makes short appearances and doesn't stay out and go traveling around with caravans, c'mon. That's a very weird thing to be suspicious about.

Most logical reason he sent people down there is to show them how many people disagree with the election, fairly simple. Makes sense to me at least.