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State Representative Theresa Mah of the Illinois 24th House District faces challenger Lai Ching Ng in the Democratic primary. Republican Natalian Bolton is running unopposed.
Votes will be counted in contested races after polls close in Illinois at 7 p.m. Central. See statewide election results here. Last minute questions about voting? View our voter guide. Here is one for Chicago residents and one for suburban residents.
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