The Sangamon County Republican Party isn't an ideological organization as much as it's a team effort to get government jobs and contracts. They live and die by the jobs they control through the county, park district, convention center and so on. There's nothing they want more than to get their hands back into that state government honeypot.
Since no other issue is more important to them, I interpret an endorsement by the Sangamon County Republicans as a sign of which candidate is most likely to doll out jobs and contracts to the party faithful. So who's the unanimous choice of Sangamon Republican leaders? Kirk Dillard!
It's no surprise. Dillard was Jim Edgar's chief of staff. Edgar openly defended the patronage system as a GOOD thing and they were very helpful to Springfield Republicans. As chief of staff, Dillard must have been involved in handing out the spoils of victory.
If you're a Republican whose real problem with Blagojevich is that he wasn't steering enough jobs and contracts to your team, then now you know who to vote for.