Article talking about that very thing.
“In Arizona's Maricopa County, the largest county in one of the most important battleground states, snipers will be deployed on the roof to protect its tabulation center, where votes will be counted. The center will also install metal detectors and security at every entrance. Drones will be used… security cameras and floodlights.”
https://www.newsweek.com/election-violence-snipers-workers-1973636