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:
Wisconsin Any member of the public may be present at any polling place for the purpose of observation of an election except a candidate whose name appears on the ballot at the polling place or on an absentee ballot to be cast at the clerk's office or alternate site at that election. The chief inspector or municipal clerk may reasonably limit the number of persons representing the same organization who are permitted to observe at the same time. Each person permitted to observe under shall print his or her name in and sign and date a log maintained by the chief inspector or municipal clerk for that polling place, office, or alternate site. The chief inspector or municipal clerk shall clearly designate observation areas for election observers. The observation areas shall be so positioned to permit any election observer to readily observe all public aspects of the voting process. (see Wis. Stat. § 7.41).
Each inspector shall challenge for cause any person offering to vote whom the inspector knows or suspects is not a qualified elector or who does not adhere to any voting requirement under this chapter. Any elector may challenge for cause any person offering to vote whom the elector knows or suspects is not a qualified elector. (Wis. Stat. § 6.92, 6.925).