“I’d stick as many ballot watchers as possible in everyone of those 40 Philly precincts”
It might help in some polling places but unfortunately cheating is now done via technological monkey business. All behind the scenes; a poll watcher would/could see nothing.
Have his people check the machines. They should do everything they can. You don’t sit back without trying to mitigate the fraud. No effort leaves a much larger chance for more voter fraud.