The special election will take place on 7 August 2018, with primary elections occurring in May (Roll Call, CNBC, Ballotpedia). See our FAQ to learn about how we resolve questions and how scores are calculated.

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Troy Balderson (Republican) won Ohio's 12th Congressional District special election. This question closed as "Republican Party" with an end date of 7 August 2018. _{See our FAQ to learn about how we resolve questions and how scores are calculated.}