There has been much discussion about whether votes in this next election will be counted securely.
Every state has rules about what poll observers can do at the polls and how votes can be challenged. Here are the rules for your state:
Idaho The county clerk shall, upon receipt of a written request, direct that the election judges permit one (1) person authorized by each political party, if the election is a partisan election, to be at the polling place for the purpose of challenging voters, and shall, if requested, permit any one (1) person authorized by a candidate, several candidates or political party, to be present to serve as a watcher to observe the conduct of the election. (Idaho Code § 34-304).
At the time of any election, any registered elector may challenge the entry of an elector's name as it appears in the election register. (Idaho Code § 34-431)