Illinois voters headed to the polls Tuesday to decide a host of local, county, state and federal races. Nationally, the balance of power in Washington will be decided as Republicans look to gain seats in the U.S. Senate and U.S. House of Representatives.

Visit the WTTW Voter Guide for more information about Illinois candidates. Also, check in all night for full WTTW News coverage of the biggest area races. Wondering what happens to your ballot after you voter? Watch this.