Poll watchers, as the name implies, are expected to watch or observe what happens at polling places. Their primary job: Help ensure that their party has a fair shot at winning. Both parties do it.
But poll watchers can't interfere in any way with the actual voting process.
They can closely monitor the administration of the election to ensure that votes are counted accurately. And in some states, poll watchers can also challenge an individual voter's right to cast a ballot. Partisan poll watchers, however, must conduct those challenges through official poll workers and cannot stop or otherwise try to interfere with someone trying to vote.
Even if a poll watcher challenges an individual voter – for instance, by arguing that the person's name doesn't appear on the local voting rolls – states often allow that person to cast a "provisional" ballot to be counted later, once his or her right to vote has been verified.
Poll watchers can also help turn out the vote by counting the voters who have cast ballots and helping their respective candidates track which potential supporters haven't yet voted. That helps campaigns mount last-minute Election Day efforts to get those voters to cast their ballots before polls close.






