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Ballotpedia's Election Analysis Hub, 2018

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2018 Election Analysis
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Other 2018 election coverage
Election results
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Elections by state and year

Tens of thousands of elections took place in 2018 across the United States, including primary and general elections at the federal, state, and local levels. Within these elections, there were a variety of different trends and patterns that relayed a certain level of political significance. In 2018, we identified and followed a series of narratives—big picture stories—up-and-down the ballot and across the country throughout the year. This page presents Ballotpedia's research and curation on the 2018 elections in the United States.

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


Local elections

In 2018, Ballotpedia covered elections for mayor, city council, and all other city officials in the 100 largest cities by population in the United States, as well as elections for county officials whose jurisdictions overlapped with those cities.

Local elections:
Ballotpedia's 2018 Candidate Connection report
United States municipal elections, 2018
School board elections, 2018
Partisanship in United States municipal 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



Election coverage by office


Election coverage by state

Click your state on the map below to navigate to relevant election information.
See also: Elections by state and year.

http://ballotpedia.org/STATE_elections,_2018

Election resources