He been doing that since before 2016. Even the limited audience at his tv show were picked, but they were probably charged to get in.
All and every crowd behind cheeto at the outdoor and indoor rally's are brought in and paid. Too many internet sleuths have identified groups of the same people behind him across the country. Busloads of people travel to all the shows and locals are hired at the location. The campaign calls it 'optics' and video filler.
It is even known that the immediate crowd in front has been supplied as well as all camera shots are carefully framed to try to show full chair usage.
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