[Kuksool]

Crook County is losing population. It won't make IL a red state anytime soon. IL's blue sea is spreading into the red zones of IL (like my township). In the past, many Chicago folks became disgusted with the Daley Machine and moved into the suburbs. They switched from RAT to GOP.

Nowadays, Chicago folks, who move to the suburbs and exurbs, maintain their RAT allegiance. The collapse of the GOP in the Cook County suburbs and the erosion in the exurbs are why IL won't be voting for a Republican in a statewide election for a long time.

[MplsSteve]

Is the collapse of the Illinois GOP (in the suburbs and exurbs) due only to outward immigration from Chicago proper?

Or has the in-fighting within the Illinois GOP contributed mightily to what you're seeing now?