Updated 11:20 p.m.
The winner of the 6th Congressional District Democratic primary will face incumbent Republican Peter Roskam, in the November election. Roskam has held the 6th U.S. Congressional District seat since 2007.
The 6th Congressional District spans five counties including parts of Lake, Kane, McHenry, Cook and DuPage. The Illinois State Board of Elections has a district locator.
See below for updated polling numbers, which we'll refresh when more precincts are reported.
For the latest news throughout the evening, check our 2012 Election Blog. And our can give you a recap of each local race and candidate.
(559/560 precincts reporting)Candidate Percentage Total votes Leslie Coolidge 53% 9,479 Geoffrey Petzel 13% 2,329 Maureen Yates 34% 5,997