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Election results, 2018

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2018 Election Results
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This page outlines the results of the November 6, 2018, general elections at each level of government. Elections were held in all 50 states, with all 435 seats in the U.S. House, 35 of the 100 seats in the U.S. Senate, and 36 of the country's 50 governorships up for election.

At the federal level, the 2018 elections saw Republicans expand their majority in the U.S. Senate as Democrats won control of the U.S. House. In state elections, Democrats won control of seven governors' offices from the GOP and the trifecta status of 10 states changed. After the 2018 elections, there were 36 trifectas nationwide; just below the 37 trifectas that existed in 2013 and 2014, the most in recent history. Democrats had a net gain of five state government triplexes and Republicans had a net loss of four.

In 2010, Republicans won control of 12 governorships from the Democratic Party. They held 11 of those offices—all but Pennsylvania—in 2014. In 2018, five of the remaining 11 governorships flipped back to Democrats: Kansas, Maine, Michigan, New Mexico, and Wisconsin. The remaining six states—Florida, Iowa, Ohio, Oklahoma, Tennessee, and Wyoming—all elected Republican governors for the third straight time.

In state legislative elections, Democrats had a net gain of 308 state legislative seats and Republicans had a net loss of 296 seats. Democrats flipped control of five legislative chambers from Republicans, leaving the new state legislative chamber count at 61 chambers under a Republican majority, 37 under a Democratic majority, and one under split control.

On this page, you will find:

Results summary

State government trifectas

The map below shows the status of state government trifectas as a result of the 2018 elections. The second map shows the status of state government trifectas before the 2018 elections.

Comparison with other midterms

The chart below compares the gains and losses for the Democratic and Republican parties in 2018 with their gains and losses in three previous first midterms for newly-elected presidents: 2010 (Obama), 2002 (George W. Bush), and 1994 (Clinton). The chart compares the result of a midterm election with the result of the election that immediately preceded it, accounting for the results of off-year elections, special elections, and appointments that occurred between the two elections. For example, the Republican Party is listed as gaining one seat in the 2018 U.S. Senate elections because Republicans had a 52-48 majority after the 2016 elections and a 53-47 majority after the 2018 elections.

Election type 2018 2010 2002 1994
Party gains/losses D (+/-) R (+/-) D (+/-) R (+/-) D (+/-) R (+/-) D (+/-) R (+/-)
U.S. Senate -1 1 -5 5 -1 1 -5 5
U.S. House[1] 41 -42 -63 64 -8 8 -54 54
Governors 7 -6 -7 6 3 -1 -10 10
Attorneys General 4 -2 -6 6 -2 2 -9 9
State senates 5 -5 -7 7 -1 1 -6 7
State houses 1 -2 -13 13 -2 3 -11 11
State legislative seats 349 -349 -702 699 -177 110 -488 496


Further analysis


State legislative chambers and offices changing party control

The following tables show state legislative chambers, gubernatorial offices, attorney general offices, and secretary of state offices that changed party control as a result of the 2018 elections.

Flipped state legislative chambers, 2018 elections
State Chamber Pre-election control Post-election control
Alaska House Democrats Democratic Party Power sharing Independent_American_Party
Colorado Senate Republicans Republican Party Democrats Democratic Party
Maine Senate Republicans Republican Party Democrats Democratic Party
Minnesota House Republicans Republican Party Democrats Democratic Party
New Hampshire House Republicans Republican Party Democrats Democratic Party
New Hampshire Senate Republicans Republican Party Democrats Democratic Party
New York Senate Republicans Republican Party Democrats Democratic Party


Gubernatorial offices that changed party hands, 2018 elections
State Pre-election control Post-election control
Alaska Bill Walker Grey.png Mike Dunleavy Republican Party
Illinois Bruce Rauner Republican Party J.B. Pritzker Democratic Party
Kansas Jeff Colyer Republican Party Laura Kelly Democratic Party
Maine Paul LePage Republican Party Janet Mills Democratic Party
Michigan Rick Snyder Republican Party Gretchen Whitmer Democratic Party
Nevada Brian Sandoval Republican Party Steve Sisolak Democratic Party
New Mexico Susana Martinez Republican Party Michelle Lujan Grisham Democratic Party
Wisconsin Scott Walker Republican Party Tony Evers Democratic Party


Attorney general offices that changed party control, 2018 elections
State Pre-election control Post-election control
Colorado Cynthia Coffman Republican Party Phil Weiser Democratic Party
Michigan Bill Schuette Republican Party Dana Nessel Democratic Party
Nevada Adam Laxalt Republican Party Aaron Ford Democratic Party
Wisconsin Brad Schimel Republican Party Josh Kaul Democratic Party


Secretary of State offices that changed party control, 2018 elections
State Pre-election control Post-election control
Arizona Michele Reagan Republican Party Katie Hobbs Democratic Party
Colorado Wayne Williams Republican Party Jena Griswold Democratic Party
Michigan Ruth Johnson Republican Party Jocelyn Benson Democratic Party


Statewide ballot measure election results

Alabama

See also: Alabama 2018 ballot measures

Alaska

See also: Alaska 2018 ballot measures

Arizona

See also: Arizona 2018 ballot measures

Arkansas

See also: Arkansas 2018 ballot measures

California

See also: California 2018 ballot measures

Colorado

See also: Colorado 2018 ballot measures

Connecticut

See also: Connecticut 2018 ballot measures

Florida

See also: Florida 2018 ballot measures

Georgia

See also: Georgia 2018 ballot measures

Hawaii

See also: Hawaii 2018 ballot measures

Idaho

See also: Idaho 2018 ballot measures

Indiana

See also: Indiana 2018 ballot measures

Kentucky

See also: Kentucky 2018 ballot measures

Louisiana

See also: Louisiana 2018 ballot measures

Maine

See also: Maine 2018 ballot measures

Maryland

See also: Maryland 2018 ballot measures

Massachusetts

See also: Massachusetts 2018 ballot measures

Michigan

See also: Michigan 2018 ballot measures

Missouri

See also: Missouri 2018 ballot measures

Montana

See also: Montana 2018 ballot measures

Nebraska

See also: Nebraska 2018 ballot measures

Nevada

See also: Nevada 2018 ballot measures

New Hampshire

See also: New Hampshire 2018 ballot measures

New Jersey

See also: New Jersey 2018 ballot measures

New Mexico

See also: New Mexico 2018 ballot measures

North Carolina

See also: North Carolina 2018 ballot measures

North Dakota

See also: North Dakota 2018 ballot measures

Ohio

See also: Ohio 2018 ballot measures

Oklahoma

See also: Oklahoma 2018 ballot measures

Oregon

See also: Oregon 2018 ballot measures

Rhode Island

See also: Rhode Island 2018 ballot measures

South Carolina

See also: South Carolina 2018 ballot measures

South Dakota

See also: South Dakota 2018 ballot measures

Utah

See also: Utah 2018 ballot measures

Virginia

See also: Virginia 2018 ballot measures

Washington

See also: Washington 2018 ballot measures

West Virginia

See also: West Virginia 2018 ballot measures

Types of elections

Ballotpedia covers the following types of elections at the federal, state, and local levels.

Federal

State

Local

  • Comprehensive ballot coverage for municipal elections in the top 100 U.S. cities by population, including races for the large counties that overlap them, as well as coverage of mayoral, city council, and district attorney elections in state capitals outside of the top 100 cities
  • Local trial courts with jurisdictions overlapping the top 100 cities by population
  • All local ballot measures in California, as well as ballot measures within the top 100 cities by population

Expanded local coverage

Ballotpedia is currently expanding its local election coverage on a state-by-state basis to provide information on the more than 500,000 local elected offices nationwide. This expansion included 18,974 elections in 2022, 12,624 in 2023 and 37,036 in 2024 with a goal of 30,000 in 2025, across the following states: Arizona, Arkansas, California, Delaware, Florida, Georgia, Hawaii, Illinois, Iowa, Indiana, Kentucky, Maine, Michigan, Minnesota, Montana, New Mexico, Nevada, North Carolina, Ohio, Oklahoma, Rhode Island, South Carolina, Texas, Washington, Wisconsin, and Wyoming.

This expanded coverage of local elections beyond the scope described above includes:

  • Election dates
  • Office names
  • Lists of candidates
  • Additional information as available

This expanded coverage does not include election results unless otherwise specified. Additionally, this expanded coverage does not follow candidates after the election as officeholders and instead focuses on providing information to voters about the candidates on their ballots.

You can use Ballotpedia's sample ballot tool to see what local elections we are covering in your area.

Other

Election analysis

Federal politics

All 435 U.S. House seats and 33 U.S. Senate seats were up for regular elections in the 2018 midterms. Heading into the election, the Republican Party held a majority in both chambers.

All federal elections:
Ballotpedia's 2018 Candidate Connection report
United States Congress elections, 2018
Ballotpedia's Top 15 elections to watch, 2018
Special elections to the 115th United States Congress (2017-2018)
List of candidates who ran in U.S. Congress elections, 2018
List of U.S. Congress incumbents who did not run for re-election in 2018
Annual Congressional Competitiveness Report, 2018
Margin of victory analysis for the 2018 congressional elections
Incumbents defeated in 2018 congressional elections
Incumbent win rates by state
New members elected in 2018 congressional elections
Comparison of state delegations to the 115th and 116th Congresses
Congressional elections decided by 10 percent or less, 2018
Results of federal elected officials seeking other offices, 2018
Noteworthy minor party candidates in the 2018 elections
PredictIt markets in the 2018 elections
Fundraising in Congressional elections, 2018
Battleground election polls, 2018
Timeline of events impacting 2018 congressional elections
Media coverage of United States Congress elections, 2018
U.S. Senate elections:
U.S. Senate battlegrounds, 2018
United States Senate elections, 2018
Control of the U.S. Senate
States with both gubernatorial and U.S. Senate elections in 2018
U.S. House elections:
U.S. House battlegrounds, 2018
United States House of Representatives elections, 2018
Control of the U.S. House
U.S. House districts represented by a Republican and won by Hillary Clinton in 2016
U.S. House districts represented by a Democrat and won by Donald Trump in 2016
U.S. House elections without a Democratic or Republican candidate, 2018


State politics

In November 2018, seats in 87 of 99 state legislative chambers, plus 36 gubernatorial seats, 30 lieutenant gubernatorial seats, 30 attorney general seats, and 27 secretary of state seats were up for election.

All state elections:
Ballotpedia's 2018 Candidate Connection report
Ballotpedia's Top 15 elections to watch, 2018
State government trifectas
Trifecta vulnerability in the 2018 elections
Veto-proof state legislatures and opposing party governors in the 2018 elections
Noteworthy minor party candidates in the 2018 elections
2018 election analysis: Incumbent win rates by state
Results of state elected officials seeking other offices, 2018
Split-ticket voting in statewide elections in 2018 and 2020
State legislative elections:
State legislative elections, 2018
State legislative battleground chambers, 2018
Number of state legislators by party
Annual State Legislative Competitiveness Report: Vol. 8, 2018
Open seats in the 2018 state legislative elections
Impact of term limits on state executive elections in 2018
Partisan balance of state legislative chambers
Incumbents defeated in 2018's state legislative elections
State legislative supermajorities
State legislative chambers where Democrats lost seats, 2018
State legislative chambers where Democrats gained seats, 2018
State legislative chambers where Republicans gained seats, 2018
State legislative chambers where Republicans lost seats, 2018
Margins of victory
Races decided by fewer than 100 votes
State legislative seats flipped
State executive elections:
State executive official elections, 2018
2018 ballot measures
Annual State Executive Competitiveness Report, 2018
Gubernatorial elections, 2018
Partisan balance of governors
States with both gubernatorial and U.S. Senate elections in 2018
Lieutenant gubernatorial elections, 2018
Attorney General elections, 2018
Secretary of State elections, 2018
State government triplexes
PredictIt markets in the 2018 elections
Battleground election polls, 2018
Media coverage of state executive elections, 2018
State judicial elections:
State judicial elections, 2018


Wave elections

Ballotpedia published an exclusive report that examined the results of the 50 election cycles that occurred between 1918 and 2016—spanning from President Woodrow Wilson's (D) second midterm in 1918 to Trump's first presidential election in 2016. In it, we seek to answer the question, "What constitutes a wave election?"

Wave elections (1918-2016):
2018 election analysis: Was 2018 a wave election?
Wave elections (1918-2016)
What is a wave?
Evaluating 2018
House waves
Senate waves
Gubernatorial waves
State legislative waves
Multiple waves
Presidential waves


Primary elections

Primary elections took place in all levels of government throughout 2018, beginning with statewide primaries in Texas on March 6, 2018, and concluding with state-level primaries in New York on September 13, 2018.

All primary elections:
Democratic Party primaries, 2018
Republican Party primaries, 2018
Ballotpedia's Top 10 primaries, 2018
Democratic Party battleground primaries, 2018
Republican Party battleground primaries, 2018
Primary partisan voter turnout comparison, 2018 v. 2014
Top 10 Closest Primaries: January to June 2018
Federal primary elections:
United States Senate Democratic Party primaries, 2018
United States Senate Republican Party primaries, 2018
United States House Democratic Party primaries, 2018
United States House Republican Party primaries, 2018
Democratic Party factional conflict in U.S. House primaries, 2018
Republican Party factional conflict in U.S. House primaries, 2018
2018 primary election competitiveness in federal government
State primary elections:
Democratic Party gubernatorial primaries, 2018
Republican Party gubernatorial primaries, 2018
State legislative Democratic primaries, 2018
State legislative Republican primaries, 2018
Ballotpedia's Top 50 state legislative primaries, 2018
Democratic Party Attorney General primaries, 2018
Republican Party Attorney General primaries, 2018
Democratic Party Secretary of State primaries, 2018
Republican Party Secretary of State primaries, 2018
2018 primary election competitiveness in state government


See also


  1. The race in North Carolina's 9th Congressional District remained uncalled as of January 2, 2019.
  2. Colorado Election Results, "Offical Certified Results November 8, 2016 General Election," accessed May 16, 2018