At many polling places across the state Tuesday, citizens will watch to make sure the process is handled in a legal way.
Jim Tenuto with the State Board of Elections says that poll watchers come in early to see how things are set up. They observe throughout the day and stick around to keep an eye on the vote counting process.
Poll watchers can raise a red flag if they think somebody is trying to commit fraud.
"They could challenge a person's right to vote, obviously in a polite way. They may say, 'oh by the way, I think this person was here earlier in the morning. He's coming back a second time.' If there is a challenge up, the judge will make the decision as to whether to sustain or overrule that challenge."
Republican Presidential Candidate Donald Trump has been encouraging supporters to monitor for potential fraud.
In most states, including Illinois, poll watchers are required to get credentials before Election Day.