MEMPHIS, Tenn. (AP) – It’s not just the choice of candidates that is contentious this presidential election. Voting itself, and who gets to do it, has become such a hot issue that federal election monitors were in Nashville and Memphis on Tuesday watching the polls.

On one side are people concerned about voter fraud who want more protections to ensure that only qualified voters cast ballots. That concern led to the state’s new voter photo identification law — currently the subject of a lawsuit — and may have been behind a poll worker training session in Nashville that taught workers how to challenge a voter’s citizenship.