Pollsters estimate undecided voters make up a pretty small slice of the electoral pie. But presidential campaigns spend a lot of time and money trying to reach that tiny group of people, especially in a year like this, when a single-digit margin could decide who wins the White House.
In Illinois, pollsters estimate that undecided voters make up only four to eight percent of the electorate. What does it take to swing a swing voter? To find out, WBEZ is tracking a few of them up until Election Day.