I'm surprised this thread hasn't pointed out the active primary race for Dems to replace Duckworth in IL-08. There are two state senators (Cullerton and Noland) with established bases who each represent about 25-30% of the CD and 2012 candidate Krishnamoorthi.
Do you have any knowledge of how Kirk and Rauner did in IL-08? That would suggest the upper limit of Pub potential here.
Rauner did very well throughout the 'burbs. IL-8, 10 and 11 are all D+8, but all went to Rauner. According to Miles fine calculations they were 54.2%, 54.5%, and 51.6% respectively. A Pub like Dold could have some impact in IL-08, but it would be an uphill climb. I don't see anyone like that currently organizing, and petitions start circulating in Sept.