How do you know who is queuing up to vote for whom?
Red
Republicans are asked to drop ballots on the left, democrats on the right
I find that one impossible to believe, since American elections are done on the basis of a "secret ballot". It's one of the founding principles of the Republic.
Also, it's illegal to hang around the polling station, packing heat or otherwise. The crime is called "voter intimmidation". There are "scrutineers" from both sides at the polls. I've been a scrutineer for elections here. Our job was to sit and make sure that voters were struck off the list when they voted, and to watch the count to ensure no shennanigans and a clean count. We had offical badges identifying us as poll workers.
No one is allowed to just hang around a polling station unless they are there to vote, or are official poll workers.