Traditionally, moderate Republicans don't do well in state-wide Illinois GOP primaries.
If Oberweis has a decent effort down-state and in the collar counties of Chicago, he stands a good chance of winning the primary.
If Oberweis wins the primary, you can expect the MSM and Dems to paint him as an extremist (ala Al Salvi).
I only see Brady signs in NW and Centeral Illinos