But according to this picture, you can't.
I live in the 18th District, right across the street from the 17th. (the green area is 17th)
So if I was actually desiring to run for Congressional Rep., I'd have to run against Colleen Callahan, Aaron Schock and Sheldon Schafer. I think that boat already has enough people in it to sink.
But thanks to a little site called "Run For Office", if I ever want to run for something again, I'll know exactly how to go about it. hehe. Go ahead and click it...see what offices YOU could be running for.