Much like most "blue" states, in Illinois, once you get out of the cities the rural communities tend to be more conservative.
I enjoyed watching this video about rural Illinois from late last year. The creator put it out after 4 that'd been about Chicago itself.
Description:
"Just beyond the bright lights of Chicago is a completely different world out in rural Illinois. Come on an adventure with me to see what's happening close to Chicago, but a world away."