Missouri law allows the chairs of each Democratic and Republican county committee to name one poll watcher for each location where votes are counted on Election Day.
The individuals are there to observe voting and vote-counting but are not allowed to interact with voters or interfere with the voting process.
FBI Special Agent C.J. Sanders says poll watchers have rules to follow.
Under federal law and state law, voter intimidation is punishable by up to one year in jail.
Missouri law does allow armed law enforcement officers to be at the polls on Election Day if requested by election officials or if they are there in the line of duty, otherwise guns are not allowed at Missouri polling locations.