Democratic incumbent Bobby Rush, who has held the seat since 1993, ran against Republican nominee Antoine Members.

Perennial candidate and alleged white supremacist Richard Mayers had attempted to run in the Green Party primary.

Earlier in 2007, Cook County Commissioner Roberto Maldonado and Chicago aldermen Manny Flores, Ricardo Muñoz and George Cardenas had announced their intentions to run for the seat in 2008, as Gutierrez had said he planned to retire.

Freshman Republican incumbent Peter Roskam, who won the then-open seat in a close election in 2006, ran against Democratic nominee Jill Morgenthaler, an Iraq War veteran.

Democratic incumbent Danny K. Davis, who has held the seat since 1997, ran against Republican nominee Steve Miller, a United States Navy veteran.

Democratic incumbent Melissa Bean, who has held the seat since 2005, ran against Republican nominee Steve Greenberg.

This district includes all of Evanston, Skokie, Niles, Morton Grove, Park Ridge and Norridge, parts of Wilmette, Northfield, Glenview, Golf, Rosemont and Des Plaines, as well as much of the North Side of Chicago.

Tim Baldermann, mayor of New Lenox and police chief of Chicago Ridge, won the Republican nomination but withdrew on February 23.

[5] This district is in the southwest part of the state and includes the cities of Alton, Carbondale and East St. Louis.

Democratic incumbent Jerry Costello, who has held the seat since August 1988, ran against Republican nominee Tim Richardson and Chairman of the Metro East Green Party Rodger Jennings.

He resigned in November 2007; Bill Foster won the special election held on March 8, 2008.

Republican incumbent Timothy V. Johnson, who has held the seat since January 2001, won against Democratic nominee Steve Cox.

Democratic incumbent Phil Hare, who has held the seat since January 2007, ran unopposed.

This district in the central and western part of the state includes the cities of Jacksonville, Peoria and Springfield.