Think "just about everywhere but Chicago and the collar counties" and you wouldn't be too far off...
Wanna see something that will blow your mind? Here is the electoral map, by county, for the 2010 Governors Election. The supreme idiot Pat Quinn won exactly TWO counties other than Cook county, and won:
The good news is, this map is become FAR less Blue than previous elections. But, this is what we have to deal with...any suggestions would be welcome.
For example, this is also Illinois
...1980 Presidential Election. Blue is Reagan...the way it should be colored for your map (ironic, the similarities, isn't it?).