Obvious racism aside… is this like “bring your hard hat to the rally” day? Get a free mustard dog? Or is he handing these out to people sitting behind him? Or did he hire a bunch of Village People impersonators as extras to increase his crowd size that he cares so much about?
You joke but literally they hire people to be behind him. Usually it is attractive women, POC, working class appearing folk or elderly women. The hard hats probably fit wherever he was speaking trying to claim he's talking to the working class or something
Last I heard they went through things like local modeling, and talent, casting agencies for most of these. Sometimes you will see ads in papers to appear in political publications, commercials, etc. and it ends up that you are in stuffing a rally, they do use images, and video clips, of the rallies, for promotion, and you will likely be in there, somewhere, so it technically isn't lying. It is a lot like how movies get extras.