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A crowded field seeks to replace outgoing U.S. Rep. Robin Kelly, who is running for U.S. Senate instead of seeking another term in the House.
On the Democratic ballot are 10 candidates: Robert Peters, Eric France, Donna Miller, Yumeka Brown, Willie Preston, Jesse Jackson, Patrick Keating, Toni Brown, Sidney Moore and Adal Regis.
Republican Michael Noack is running unopposed.
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Votes will be counted in contested races after polls close in Illinois at 7 p.m. See statewide election results here. Last minute questions about voting? View our voter guide.