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Rep. André Carson is facing three primary challengers on the Democratic ballot: Denise Hatch, George Hornedo and Destiny Wells. Two candidates appear on the Republican ballot: Patrick McAuley and Felipe Rios.
Votes will be counted in contested races after polls close in Indiana at 6 p.m. local time. See statewide election results here.
Last-minute questions about voting? Check your registration status, where to vote and see a sample ballot here.