United States Senate elections, 2018

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United States Senate elections, 2018
United States
2016 ←
November 6, 2018 → 2020

Class 1 (33 of the 100) seats in the United States Senate
51 seats needed for a majority
  Majority party Minority party
  Sen Mitch McConnell official.jpg Charles Schumer official portrait.jpg
Leader Mitch McConnell Chuck Schumer
Party Republican Democratic
Leader since January 3, 2007 January 3, 2017
Leader's seat Kentucky New York
Seats before 52 46
Seats up 8 23

  Third party
Party Independent
Seats before 2
Seats up 2

2018 Senate Map.png

     Democrat running      Republican running      Independent running
     Democrat undeclared      Republican undeclared      No election

Majority Leader before election

Mitch McConnell

Elected Majority Leader


Elections to the United States Senate will be held on November 6, 2018 with 33 of the 100 seats in the Senate being contested in regular elections whose winners will serve six-year terms from January 3, 2019 until January 3, 2025. Currently, Democrats are expected to have 23 seats up for election, additionally 2 independents who caucus with the Democrats are facing the end of their current term. Republicans are expected to have 8 seats up for election. The seats up for election in 2018 were last up for election in 2012, although some seats may have special elections if incumbents die or resign. Democrats gained 2 seats in the 2016 Senate elections.

The United States House of Representatives elections, 39 gubernatorial elections, and many other state and local elections will also be held on this date.

Partisan composition[edit]

The partisan composition of the Senate going into the 2018 election will depend on the results of the 2016 Senate elections. Among the 33 Class I Senators up for regular election in 2018, there will be 23 Democrats, 2 independents who caucus with the Senate Democrats, and 8 Republicans. If a Senate vacancy occurs between 2016 and 2018, there may be special elections before or during the 2018 election, depending on state law.

Parties Total
Democratic Republican Independent
Last election (2016) 46 52 2 100
Before this election TBD TBD TBD 100
Not up 23 44 0 67
Class 2 (20142020) 11 22 0 33
Class 3 (2016→2022) 12 22 0 34
Up 23 8 2 33
Class 1 (2012→2018) 23 8 2 33
Special: Class 2 & 3[1] 0 0 0 0
Incumbent retiring 0 0 0 0
Incumbent running 16 2 2 20
Intent undeclared 7 6 0 13

Election predictions[edit]

Democrats are expected to target the Senate seats in Nevada and Arizona. [2] Democrats could also target Texas.[3] Republicans are expected to target Democratic-held seats in Indiana, Missouri, Montana, North Dakota, and West Virginia, all of which voted for Mitt Romney in the 2012 election and Donald Trump in the 2016 election,[4] as well as seats in Florida, Ohio, Pennsylvania, Wisconsin, and Michigan, all of which voted for Donald Trump in the 2016 election.[5] Republicans could also target seats in Virginia, Maine, and New Jersey.[2] Other races may also become competitive.

All seats classified with at least one rating of anything other than "safe" or "solid" are listed below.

State 2014 PVI Incumbent 2012
Nov. 10
Jan. 13
Arizona R+7 Flake, JeffJeff Flake (R) 49% R Lean R Likely R
Florida R+2 Nelson, BillBill Nelson (D) 55% D Lean D Lean D
Indiana R+5 Donnelly, JoeJoe Donnelly (D) 50% D Lean D Tossup
Maine D+6 King, AngusAngus King (I) 53% I Lean D Safe D
Michigan D+4 Stabenow, DebbieDebbie Stabenow (D) 59% D Likely D Safe D
Missouri R+5 McCaskill, ClaireClaire McCaskill (D) 55% D Lean D Tossup
Montana R+7 Tester, JonJon Tester (D) 49% D Likely D Lean D
Nevada D+2 Heller, DeanDean Heller (R) 46% R Lean R Lean R
New Jersey D+6 Menendez, BobBob Menendez (D) 59% D Likely D Safe D
North Dakota R+10 Heitkamp, HeidiHeidi Heitkamp (D) 50% D Likely D Tossup
Ohio R+1 Brown, SherrodSherrod Brown (D) 51% D Lean D Lean D
Pennsylvania D+1 Casey, BobBob Casey (D) 54% D Likely D Lean D
Virginia Even Kaine, TimTim Kaine (D) 53% D Likely D Likely D
West Virginia R+13 Manchin, JoeJoe Manchin (D) 61% D Likely D Tossup
Wisconsin D+2 Baldwin, TammyTammy Baldwin (D) 51% D Likely D Lean D

Cook and Rothenberg consider the states listed below to be safe seats for the party currently holding the seat.

Safe Democratic Safe Republican
California Mississippi
Connecticut Nebraska
Delaware Tennessee
Hawaii Texas
Massachusetts Utah
Maryland Wyoming
New Mexico
New York
Rhode Island
Vermont O

O Held by an independent who caucuses with the Democrats.

Race summary[edit]

(linked to
summaries below)
Incumbent Candidates
Senator Party Electoral
Arizona Jeff Flake Republican 2012 Unknown Kelli Ward (Republican)[8]
California Dianne Feinstein Democratic 1992 (Special)
Connecticut Chris Murphy Democratic 2012 Running Chris Murphy (Democratic)[9]
Delaware Tom Carper Democratic 2000
Florida Bill Nelson Democratic 2000
Running Bill Nelson (Democratic)[10]
Hawaii Mazie Hirono Democratic 2012 Running Mazie Hirono (Democratic)
Indiana Joe Donnelly Democratic 2012 Running Joe Donnelly (Democratic)[11]
Maine Angus King Independent 2012 Running Angus King (Independent)[12]
Maryland Ben Cardin Democratic 2006
Massachusetts Elizabeth Warren Democratic 2012 Running Elizabeth Warren (Democratic)[13]
Michigan Debbie Stabenow Democratic 2000
Minnesota Amy Klobuchar Democratic 2006
Running Amy Klobuchar (Democratic)[14]
Mississippi Roger Wicker Republican 2007 (Appointed)
2008 (Special)
Missouri Claire McCaskill Democratic 2006
Running Claire McCaskill (Democratic)[15]
Montana Jon Tester Democratic 2006
Running Jon Tester (Democratic)[16]
Nebraska Deb Fischer Republican 2012 Unknown
Nevada Dean Heller Republican 2011 (Appointed)
Running Dean Heller (Republican)[17]
New Jersey Bob Menendez Democratic 2006 (Appointed)
New Mexico Martin Heinrich Democratic 2012 Running Martin Heinrich (Democratic)[18]
New York Kirsten Gillibrand Democratic 2009 (Appointed)
2010 (Special)
Running Kirsten Gillibrand (Democratic)[19]
North Dakota Heidi Heitkamp Democratic 2012 Unknown
Ohio Sherrod Brown Democratic 2006
Running Sherrod Brown (Democratic)[20]
Josh Mandel (Republican)[21]
Pennsylvania Bob Casey, Jr. Democratic 2006
Running Bob Casey, Jr. (Democratic)[22]
Dale Kerns (Libertarian)[23]
Rhode Island Sheldon Whitehouse Democratic 2006
Running Sheldon Whitehouse (Democratic)[24]
Tennessee Bob Corker Republican 2006
Unknown Larry Crim (Republican)[25]
Texas Ted Cruz Republican 2012 Running Ted Cruz (Republican)[26][27]
Utah Orrin Hatch Republican 1976
Vermont Bernie Sanders Independent 2006
Running Bernie Sanders (Independent)[28]
Virginia Tim Kaine Democratic 2012 Running Tim Kaine (Democratic)[29]
Washington Maria Cantwell Democratic 2000
West Virginia Joe Manchin Democratic 2010 (Special)
Running Joe Manchin (Democratic)[30][31]
Wisconsin Tammy Baldwin Democratic 2012 Running Tammy Baldwin (Democratic)[32]
Wyoming John Barrasso Republican 2007 (Appointed)
2008 (Special)
State Senator Party Electoral
Intent Candidates

Complete list of races[edit]

Thirty-three seats are up for election in 2018:

  • Fourteen Democrats are running for re-election.
  • Nine Democrats may seek re-election.
  • Two independents are running for re-election.
  • Two Republicans are running for re-election.
  • Six Republicans may seek re-election.


With the presumptive appointment of Jeff Sessions as the next United States Attorney General, Alabama Governor Robert Bentley(R) has said he will appoint a temporary replacement to serve until the 2018 elections, when that candidate would serve until Sessions term ended. Bentley said it would correspond with the 2018 Elections to save taxpayers money.[33]

Alabama Attorney General Luther Strange has indicated he is running in 2018 regardless of whom Bentley chooses. Strange seems to be the early favorite of Bentley.[34] However, controversial former State Supreme Court Chief Justice Roy Moore. Another earlier favorite is Tim James, son of former Governor Fob James. James came within less than 167 votes of beating Bentley for the runoff spot in the 2010 Governor Republican primary. Instead Bentley defeated the front runner and current U.S. Congressman Bradley Byrne. James ran for Governor in 2002. Members of Congress like Robert Aderholt, Martha Roby, and Mo Brooks have all interviewed with Bentley who has interviewed 19 potential replacements, all Republican. One opponent of Bentleys who is mulling a Senate bid is State Auditor Jim Ziegler who has criticized Bentley over the appointment process.[35]

The Democratic bench is much more quiet though. Ron Crumpton, the 2016 Senate nominee, said he was running. Former Governor Jim Folsom Jr. is strongly being urged to run. He was the 1980 U.S. Senate nominee. State Senator Vivian Davis Figures who was the 2008 Senate nominee is actively seeking support as well.


One-term Republican Senator Jeff Flake was elected with 49% of the vote in 2012. He will be 55 years old in 2018.

Former state senator Kelli Ward, who won 39% of the vote against John McCain in the 2016 Republican Senate primary, is running for the Republican nomination.[36] Radio host, author, and conservative commentator Laura Ingraham may move to Arizona to challenge Flake in the Republican primary, though she is also considering running for Senator Tim Kaine's seat in Virginia.[37][38] Other potential Republican candidates include Congressman Ben Quayle, Matt Salmon, and David Schweikert.

Potential Democratic candidates include U.S. Representative Kyrsten Sinema, former U.S. Representative Gabby Giffords, and astronaut Mark Kelly.[39]


Four-term Democratic Senator Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She won re-election in 2012 with 63% of the vote, taking the record for the most popular votes in any U.S. Senate election in history, having received 7.75 million votes.[40] Feinstein is the Ranking Member of the Select Committee on Intelligence. She will be 85 years old in 2018.

Potential Democratic candidates include Mayor of Los Angeles Eric Garcetti,[41] U.S. Representative Loretta Sanchez,[41][42][41] and hedge fund manager, philanthropist, environmentalist Tom Steyer.[41]


One-term Democratic Senator Chris Murphy was elected with 55% of the vote in 2012. He will be 45 years old in 2018.


Three-term Democratic Senator Tom Carper won re-election with 66% of the vote in 2012. He will be 71 years old in 2018.


Three-term Democratic Senator Bill Nelson was re-elected with 55% of the vote in 2012. Nelson is Ranking Member of the United States Senate Committee on Commerce, Science and Transportation. Nelson will be 76 years old in 2018. He has strongly hinted he will seek re-election to a fourth term in office.[43]

Potential Republican candidates include Chief Financial Officer of Florida Jeff Atwater, Florida Commissioner of Agriculture Adam Putnam, U.S. Representatives Tom Rooney, Ron DeSantis, and David Jolly, Lieutenant Governor of Florida Carlos López-Cantera, and Rick Scott, the Governor of Florida.[44]


One-term Democratic Senator Mazie Hirono was elected with 63% of the vote in 2012. She will be 71 years old in 2018.


One-term Democratic Senator Joe Donnelly was elected with 50.04% of the vote in 2012. He will be 63 years old in 2018.

Attorney Mark Hurt has formed an exploratory committee for a potential campaign for the Republican nomination.[45][46] Other potential Republican candidates include U.S. Representatives Marlin Stutzman, Susan Brooks, Luke Messer, State Speaker of the House Brian Bosma, and former Indianapolis Mayor Greg Ballard.[47] Disability Rights Attorney Andrew Straw has filed paperwork with the Secretary of the U.S. Senate[48] to run as a Disability Party candidate in Indiana in 2018.


One-term Independent Senator Angus King was elected in a three-way race with 53% of the vote in 2012. King has caucused with the Democratic Party since taking office in 2013, but he has left open the possibility of caucusing with the Republican Party in the future.[49] This Senate election is scheduled to be the first in Maine to be conducted with ranked choice voting, as opposed to a simple plurality, after voters passed a citizen referendum approving the change in 2016.[50] King has indicated he will seek reelection.[51]

Republican Governor of Maine Paul LePage has stated he will run unless hired by Donald Trump's administration.[52] State Senator Eric Brakey is also a potential candidate.[53]

Former Democratic State Representative Diane Russell is considering running. [54]


Two-term Democratic Senator Ben Cardin was re-elected with 56% of the vote in 2012. He will be 75 years old in 2018.


One-term Democratic Senator Elizabeth Warren was elected with 54% of the vote in 2012. She will be 69 years old in 2018. In January 2017, Warren announced through her Facebook page that she will seek reelection in 2018.

Potential Republican candidates include former professional baseball player Curt Schilling.[55]

Former Governor Bill Weld may run as a Libertarian.[56]


Three-term Democratic Senator Debbie Stabenow was re-elected with 59% of the vote in 2012. Stabenow is Ranking Member of the Senate Agriculture Committee. She will be 68 years old in 2018.

Potential Republican candidates include U.S. Representatives Justin Amash[57] and Candice Miller.


Two-term Democratic Senator Amy Klobuchar was re-elected with 65% of the vote in 2012. She will be 58 years old in 2018.

Democrats R.T. Rybak, Lori Swanson, and Tim Walz have been mentioned as potential candidates.[58]

Republicans Erik Paulsen and Tim Pawlenty are considered potential candidates.


One-term Republican Senator Roger Wicker won re-election with 57% of the vote in 2012. He was appointed in 2007 and won a special election in 2008 to serve the remainder of Trent Lott's term. He will be 67 years old in 2018.


Two-term Democratic Senator Claire McCaskill was re-elected with 55% of the vote in 2012. She will be 65 years old in 2018.

Potential Republican challengers include U.S. Representative Ann Wagner[59] and 2016 Libertarian Party presidential candidate Austin Petersen[60]


Two-term Democratic Senator Jon Tester was re-elected with 49% of the vote in 2012. He will be 62 years old in 2018.

Potential Republican candidates include U.S. Representative Ryan Zinke, former Governor Marc Racicot,[61] Montana Secretary of State-elect Corey Stapleton,[62] businessman and 2016 gubernatorial nominee Greg Gianforte,[63] and former U.S. Navy SEAL, Rob O'Neill.[64] President-elect Trump announced on December 15, 2016 that Zinke would be his nominee for Secretary of the Interior.[65] Assuming he is confirmed, this removes Zinke from contention for the Senate.


One-term Republican Senator Deb Fischer was elected with 56% of the vote in 2012. She will be 67 years old in 2018.


One-term Republican Senator Dean Heller was elected with 46% of the vote in 2012. He had been appointed to the seat in 2011. He will be 58 years old in 2018. Heller considered running for governor, but has since chosen to seek reelection.[66][67]

On the Democratic side, U.S. Representative Dina Titus, and former U.S. Representatives Shelley Berkley (who was the nominee in 2012) and Steven Horsford are potential candidates.[68]

New Jersey[edit]

Two-term Democratic Senator Bob Menendez was re-elected with 59% of the vote in 2012. Menendez was originally appointed to the seat in January 2006. He will be 64 years old in 2018.

If Menendez were to retire, the poll showed that Richard Codey would lead a Democratic primary with 33% of the vote, followed by Rob Andrews (13%), Frank Pallone (13%) and Stephen M. Sweeney (6%) with 35% undecided. In a hypothetical general election, the poll showed that Kean would lead Andrews 33% to 17% with 50% undecided, and Codey would lead Kyrillos 34% to 25% with 41% undecided.[69][70]

Polling by Harper Polling/Conservative Intel in March 2013 showed Thomas Kean, Jr. taking 41% of the vote in a hypothetical 2018 Republican primary matchup, with Kim Guadagno at 33%, Joseph M. Kyrillos at 12%, and 14% undecided.

New Mexico[edit]

One-term Democratic Senator Martin Heinrich was elected with 51% of the vote in 2012. He will be 47 years old in 2018.

New York[edit]

One-term Democratic Senator Kirsten Gillibrand was elected with 72% of the vote in 2012. She had previously been appointed to the seat in 2009, and won a special election to remain in office in 2010. She will be 51 years old in 2018.

North Dakota[edit]

One-term Democratic Senator Heidi Heitkamp was elected with 50% of the vote in 2012. She will be 63 years old in 2018.

Potential Republican candidates include State Rep. and 2016 candidate for Governor Rick Becker,[71][72] Governor Jack Dalrymple, U.S. Representative Kevin Cramer, Lieutenant Governor Drew Wrigley, and former Governor and Secretary of Agriculture Ed Schafer.


Two-term Democratic Senator Sherrod Brown was re-elected with 51% of the vote in 2012. He will be 65 years old in 2018.

Ohio State Treasurer Josh Mandel is running for the Republican nomination.[21]

Other potential Republican candidates include Governor John Kasich,[73] U.S. Representative Pat Tiberi,[74][75][76] U.S. Representative Jim Renacci,[77][78] and State Senator and former Speaker pro tempore of the Ohio House of Representatives Matt Huffman.[79]

Former Senator and current Ohio Attorney General Mike DeWine (who lost this Senate seat to Brown in 2006) was speculated to have been considering a rematch with Brown, but inadvertently announced in May 2016 that he will instead run for Governor.[80]


Two-term Democratic Senator Bob Casey, Jr. was re-elected with 54% of the vote in 2012. He will be 58 years old in 2018.

Potential Republican candidates include former Governor Tom Corbett, Scott Wagner,[81] and Congressmen Pat Meehan, Charlie Dent, and Mike Kelly.[82]

In addition, Libertarian candidate Dale Kerns announced his candidacy for Bob Casey's seat.

Rhode Island[edit]

Two-term Democratic Senator Sheldon Whitehouse was reelected with 64% of the vote in 2012. He will be 63 years old in 2018.


Two-term Republican Senator Bob Corker was re-elected with 65% of the vote in 2012. Corker is the Chairman of the United States Senate Committee on Foreign Relations. He will be 66 years old in 2018. Corker may run for Governor of Tennessee in 2018.[83][84][85] Senator Corker has also filed his Statement of Candidacy with the Secretary of the U.S. Senate to run for reelection to the U.S. Senate seat he currently holds in 2018.[86]

Larry Crim, a former Conservative Democrat for U.S. Senate in 2012 and 2014 and elected Republican Nominee for Nashville Davidson County Assessor of Property[87] is running for the Republican nomination.[25] Should Corker not run for re-election, possible additional Republican candidates include Governor Bill Haslam, Speaker of the Tennessee House of Representatives Beth Harwell, Tennessee Secretary of State Tre Hargett, Commissioner of the Department of Economic and Community Development Bill Hagerty and U.S. Representative Diane Black.[88]

Potential Democratic candidates include former Nashville Mayor Karl Dean and Former Commissioner of Economic and Community Development Matthew Kisber.[88]


One-term Republican Senator Ted Cruz was elected with 57% of the vote in 2012. Cruz is running for re-election.[26]

Potential Republican candidates include author, minister, and former Vice Chair of the Republican Party of Texas David Barton;[89] Texas Land Commissioner George P. Bush, Lieutenant Governor Dan Patrick; former Governor Rick Perry;[90] and Congressmen Michael McCaul, Jeb Hensarling, and Louie Gohmert.[91]

Potential Democratic candidates include State Representative Rafael Anchia, former State Representatives Trey Martinez Fischer, and Mike Villarreal,[92] United States Secretary of Housing and Urban Development Julian Castro, Congressman Joaquin Castro, Congressman Beto O'Rourke,[93] 2014 gubernatorial nominee and former State Senator Wendy Davis, and 2014 lieutenant gubernatorial nominee and State Senator Leticia Van de Putte.[94]


Seven-term Republican Senator Orrin Hatch was re-elected with 65% of the vote in 2012. Hatch is the President pro tempore of the Senate, as well as the second most-senior Senator. Hatch is the chairman of the Senate Finance Committee. He will be 84 years old in 2018. Before the 2012 election, Hatch said that he would retire at the end of his seventh term if he was re-elected.[95] However he has since "left the door ajar", but has denied that he has changed his mind.[96]

Former Republican Governor Mike Leavitt are potential candidates,[97][98] as are state party chair Thomas Wright, former State Senator and 2012 candidate Dan Liljenquist, Attorney General Sean Reyes, Lieutenant Governor Spencer Cox, State Senator Aaron Osmond, Mitt Romney's son Josh Romney, and U.S. Representatives Jason Chaffetz, Chris Stewart, Mia Love[99] and co-chair of No Labels, former Governor of Utah, former Ambassador to China and Republican candidate for President of the United States in 2012 Jon Huntsman Jr.[100][101][102]

Potential Democratic candidates include former U.S. Representative Jim Matheson.[99]

Potential Independent and Third Party candidates include former CIA agent and independent candidate for President of the United States in 2016 Evan McMullin.[103][104]


Two-term Independent Senator Bernie Sanders was re-elected with 71% of the vote in 2012. Sanders, one of two independent members of Congress, is a self-described democratic socialist.[105][106] Sanders has caucused with the Democratic Party since taking office in 2007, and he is the Ranking Member of the Budget Committee. In November 2015, Sanders announced his plans to run as a Democrat rather than an Independent in all future elections.[107] On July 28, 2016, Sanders announced he would return to the Senate as an Independent and two days later in an interview on Real Time with Bill Maher that he would run for re-election.

Activist and journalist Al Giordano has stated he intends to challenge Sanders for the Democratic nomination to protest Sanders' 2016 presidential campaign, which Giordano claims has divided the Democratic Party.[108][109][110]


One-term Democratic Senator Tim Kaine was elected with 53% of the vote in 2012. He is running for re-election.[111]

Potential Republican candidates include U.S. Representative Dave Brat, former Attorney General Ken Cuccinelli, former Hewlett-Packard CEO and 2016 presidential candidate Carly Fiorina, former U.S. Representative Tom Davis, U.S. Representative Barbara Comstock,U.S. Representative Morgan Griffith U.S. Representative Rob Wittman, State Delegate Jimmie Massie, and former Governor Jim Gilmore.[112][113][114] Conservative political commentator and talk radio host Laura Ingraham has stated that she is considering running for the seat.[115] Technology entrepreneur and 2013 Lieutenant Governor candidate Pete Snyder was considered a potential candidate, but has ruled out running.[116]


Three-term Democratic Senator Maria Cantwell was re-elected with 61% of the vote in 2012. Cantwell is the Ranking Member of the Committee on Energy and Natural Resources. She will be 60 years old in 2018.

West Virginia[edit]

One-term Democratic Senator Joe Manchin was elected with 61% of the vote in 2012. He originally won the seat in a 2010 special election. Manchin is running for re-election.[30] Other potential Democratic candidates include former U.S. Senator Carte Goodwin, State Senator Mike Green, and Delegates Doug Reynolds and Doug Skaff.[117]

Potential Republican candidates include U.S. Congressmen David McKinley and Evan Jenkins, state Attorney General Patrick Morrisey, delegate Erikka Storch, and Olympic gymnast Mary Lou Retton.[117]


One-term Democratic Senator Tammy Baldwin was elected with 51% of the vote in 2012. She is the first openly gay Senator in U.S. history.[118] She will be 56 years old in 2018.

Potential Republican candidates include Lieutenant Governor Rebecca Kleefisch, Congressman Sean Duffy, state Senate Majority Leader Scott Fitzgerald, state Sen. Leah Vukmir, state Rep. Dale Kooyenga, developer Eric Hovde, and Marine veteran Kevin Nicholson. [119] [120]


One-term Republican Senator John Barrasso was elected with 76% of the vote in 2012. Barrasso was appointed to the seat in 2007, and won a special election in 2008. Barrasso is the Chairman of the Senate Committee on Indian Affairs. He will be 66 years old in 2018.

See also[edit]


  1. ^ Subject to change if vacancies occur in Class 2 or Class 3 Senate seats.
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  3. ^ Tribune, The Texas (2017-01-06). "Rep. Beto O'Rourke "very likely" to run for Sen. Ted Cruz's seat in 2018". The Texas Tribune. Retrieved 2017-01-19. 
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