We really need to determine how he was seated behind Clinton. Was that a vetted seating area or just random based on what time he got there and took a seat. We need to be able to attack this in social media which is spinning it as being just a random open seat.
My guess is that they picked who they wanted in view of the camera. That they then vet these folks at a minimum by taking their name. The campaign would not want to have anybody hostile or a protester that close to Clinton.
Word is is that he was invited to the rally. Pathetic!