How did political parties perform in races where the same candidates ran in 2018 and 2020?

In the 2020 general election, 402 elections in Ballotpedia’s coverage scope were rematches between the same candidates who ran for office in 2018. These rematches represented about 4.2% of all general election races in Ballotpedia’s coverage scope.

Rematch elections in 2020 included:

  • 56 races for the U.S. House.
  • One state executive race.
  • 342 state legislative races.
  • Three local races in our coverage scope.

Results in 26 rematch races (three U.S. House races and 23 state legislative races) were unavailable as of December 1.

Of the called races in 2020, Republicans won 229 (about 57%) to Democrats’ 146 (about 36%) and third-party and nonpartisan candidates’ two (about 0.5%). 

In 2018, Republicans won 222 (about 55%) of the 2020 rematch districts, while Democrats won 175 (about 44%), and third-party or nonpartisan candidates won two (about 0.5%).

In 2020, 87 rematches (about 22%) were decided by a margin of 10 percentage points or fewer. In 2018, 130 (about 32%) of the same races were decided by a margin of 10 percentage points or fewer.

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James McAllister

James McAllister is a staff writer at Ballotpedia. Contact us at