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U.S. Rep Mary Miller faces multiple challengers in the primary and Democrats seeking to challenge her in November.
On the Republican ballot: Mary Miller, Judy Bowlby and Ryan Tebrugge.
On the Democratic ballot: Jennifer Todd, Randy Raley, Paul Davis and Kyle Nudo.
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.