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U.S. Senate battleground primaries, 2018

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2018 U.S. Senate Elections
Election Date
November 6, 2018
U.S. Senate Elections by State
Battlegrounds • Battleground primaries
GOP primaries • Democratic primaries
Arizona • California • Connecticut • Delaware • Florida • Hawaii • Indiana • Maine • Maryland • Massachusetts • Michigan • Minnesota • Mississippi • Missouri • Montana • Nebraska • Nevada • New Jersey • New Mexico • New York • North Dakota • Ohio • Pennsylvania • Rhode Island • Tennessee • Texas • Utah • Vermont • Virginia • Washington • West Virginia • Wisconsin • Wyoming
U.S. House Elections by State
Battlegrounds • Battleground primaries
Alabama • Alaska • Arizona • Arkansas • California • Colorado • Connecticut • Delaware • Florida • Georgia • Hawaii • Idaho • Illinois • Indiana • Iowa • Kansas • Kentucky • Louisiana • Maine • Maryland • Massachusetts • Michigan • Minnesota • Mississippi • Missouri • Montana • Nebraska • Nevada • New Hampshire • New Jersey • New Mexico • New York • North Carolina • North Dakota • Ohio • Oklahoma • Oregon • Pennsylvania • Rhode Island • South Carolina • South Dakota • Tennessee • Texas • Utah • Vermont • Virginia • Washington • West Virginia • Wisconsin • Wyoming

Regular elections were held for 33 U.S. Senate seats in 2018. In most of these races, the incumbent faced only minor competition in the primary. However, every year there are a few senate primaries that capture the attention of the nation. This page served to highlight those primary races that Ballotpedia expected to be competitive or interesting in some other way. Primary races were added to this page as they developed, although that usually didn't happen until after filing deadlines.

Criteria

See also: Battlegrounds

It is typically difficult to predict how competitive primaries will be until after filing deadlines take place. However, Ballotpedia put together a number of factors that were used to give insight into the most interesting 2018 primary elections. Factors that were used to determine the competitiveness of primaries included:

  • Whether or not the seat was open (retiring or resigning incumbent)
  • Notable endorsements of multiple candidates
  • Significant fundraising from multiple candidates
  • Number of candidates
  • Incumbent's years in office (if seeking re-election)
  • Whether or not the district's general election was expected to be a battleground

Battleground primaries

Democratic primaries

Republican primaries

By state

The following map displays which Senate seats were up for election in 2018 and identifies those races that were considered battleground elections. Mouse over a state for more detailed information.

For more in-depth information on the Democratic and Republican primaries by state, see the following pages.

Comparison of retirements

See also: List of U.S. Congress incumbents who did not run for re-election in 2018

The following table includes figures on Democratic and Republican members of Congress who either left office during their term or announced that they would not seek re-election for each election year since 2012.

Outgoing members of Congress, 2012-2018
Year Chamber Democrats not seeking re-election Republicans not seeking re-election Total not seeking re-election Democrats leaving office early Republicans leaving office early Total leaving office early
2018
U.S. Senate 0 3 3 1 2 3
U.S. House 18 34 52 3 14 17
Total 18 37 55 4 16 20
2016
U.S. Senate 3 2 5 0 0 0
U.S. House 16 24 40 2 5 7
Total 19 26 45 2 5 7
2014
U.S. Senate 5 2 7 3 2 5
U.S. House 16 25 41 3 6 9
Total 21 27 48 6 8 14
2012
U.S. Senate 6 3 10[1] 0 0 0
U.S. House 23 20 43 4 1 5
Total 29 23 53 4 1 5

See also

Footnotes

  1. ↑ Figure includes Sen. Joe Lieberman (I-Conn.).
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