United States Senate elections, 2018 - wikipedia United States Senate elections, 2018 United States Senate elections, 2018 ← 2016 November 6, 2018 2020 → 33 of the 100 seats ( Class 1 ) in the United States Senate ( and 2 special elections ) 51 seats needed for a majority Leader Mitch McConnell Chuck Schumer Party Republican Democratic Leader since January 3, 2007 January 3, 2017 Leader 's seat Kentucky New York Current seats 50 47 Seats needed Seats up 9 24 Party Independent Current seats Seats up Seats up for election ( general & special ) : Democratic incumbent running Democratic incumbent retiring Republican incumbent running Republican incumbent retiring Independent incumbent running Independent incumbent retiring No election Inset rectangle signifies a special election. Incumbent Majority Leader Mitch McConnell Republican Elections to the United States Senate will be held November 6, 2018, with 33 of the 100 seats in the Senate being contested in regular elections and two seats being contested in special elections. The winners will serve six - year terms from January 3, 2019, to January 3, 2025. Currently, Democrats have 24 seats up for election, including the seats of two independents who caucus with them. Republicans have nine seats up for election. The seats up for regular election in 2018 were last up for election in 2012 ; in addition, special elections will be scheduled if vacancies occur, as has already happened in Minnesota and Mississippi. After the 2016 elections, some state election officials are trying to upgrade voting systems in time for this election. Other elections that will be held on this date include the elections to the U.S. House of Representatives, 39 Governorships as well as various other state and local elections. Republicans can only afford to have a net loss of one Senate seat and still have a working majority with the Vice President breaking the tie in their favor. Three of the Republican seats are open as a result of retirements in Tennessee, Utah, and Arizona. Democrats are defending ten seats in states won by Donald Trump in the 2016 presidential election, while Republicans are only defending one seat in a state won by Hillary Clinton in 2016. Contents 1 Focus on competitive races 2 Partisan composition 3 Change in composition 3.1 Before the elections 3.2 After the elections 4 Most recent election predictions 5 Election dates 6 Race summary 6.1 Special elections during the preceding Congress 6.2 Elections leading to the next Congress 7 Arizona 8 California 9 Connecticut 10 Delaware 11 Florida 12 Hawaii 13 Indiana 14 Maine 15 Maryland 16 Massachusetts 17 Michigan 18 Minnesota 19 Minnesota ( Special ) 20 Mississippi 21 Mississippi ( Special ) 22 Missouri 23 Montana 24 Nebraska 25 Nevada 26 New Jersey 27 New Mexico 28 New York 29 North Dakota 30 Ohio 31 Pennsylvania 32 Rhode Island 33 Tennessee 34 Texas 35 Utah 36 Vermont 37 Virginia 38 Washington 39 West Virginia 40 Wisconsin 41 Wyoming 42 See also 43 Notes 44 References Focus on competitive races Democrats are expected to target the Republican - held Senate seats in Arizona ( open seat ) and Nevada. Democrats could also target seats in Texas, Mississippi ( at least one of the two seats ) and Tennessee 's open - seat. 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 presidential election and Donald Trump in the 2016 presidential election, as well as seats in Florida, Ohio, Pennsylvania, Wisconsin, and Michigan, all of which voted for Donald Trump in the 2016 election. Other races may also become competitive closer to election day. Partisan composition Among the 33 Class 1 Senate seats up for regular election in 2018 are 23 currently held by Democrats, two by independents who caucus with the Senate Democrats, and eight by Republicans. The Class 2 seats in Minnesota and Mississippi held by interim appointees are also up for election ; both incumbent appointees are running in their elections to finish the unexpired terms. Parties Total Democratic Republican Independent Last election ( 2016 ) 46 52 100 Before this election 47 51 100 Not up 23 42 0 65 Class 2 ( 2014 → 2020 ) 11 20 0 31 Class 3 ( 2016 → 2022 ) 12 22 0 34 Up 24 9 35 Class 1 ( 2012 → 2018 ) 23 8 33 Special : Class 2 0 Incumbent retiring 0 0 Incumbent running 24 6 32 Change in composition Before the elections Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Running Retiring Majority → Retiring Running Running Running Running Running Running Retiring After the elections TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD Majority → TBD TBD TBD TBD TBD TBD TBD TBD Key : D Democratic Republican Independent, caucusing with Democrats Most recent election predictions Most election predictors use : `` tossup '' : no advantage `` tilt '' ( used sometimes ) : advantage that is not quite as strong as `` lean '' `` lean '' : slight advantage `` likely '' or `` favored '' : significant, but surmountable, advantage ( highest ranking given from Fox News ) `` safe '' or `` solid '' : near - certain chance of victory State PVI Incumbent Most recent result Cook August 24, 2018 I.E. July 6, 2018 Sabato August 29, 2018 NYT August 27, 2018 CNN July 27, 2018 RCP August 23, 2018 Fox News August 24, 2018 Daily Kos July 27, 2018 Arizona R + 5 Jeff Flake ( R ) ( Retiring ) 49 % R Tossup Tossup Tossup Tossup Tossup Tossup Tossup Tossup California D + 12 Dianne Feinstein ( D ) 63 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Connecticut D + 6 Chris Murphy ( D ) 55 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Delaware D + 6 Tom Carper ( D ) 66 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Florida R + 2 Bill Nelson ( D ) 55 % D Tossup Tossup Tossup Tossup Tossup Tossup Tossup Tossup Hawaii D + 18 Mazie Hirono ( D ) 63 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Indiana R + 9 Joe Donnelly ( D ) 50 % D Tossup Tossup Tossup Tossup Tossup Tossup Tossup Tossup Maine D + 3 Angus King ( I ) 53 % I Safe D / I Safe D / I Safe D / I Safe D / I Safe D / I Safe D / I Likely D / I Safe D / I Maryland D + 12 Ben Cardin ( D ) 55 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Massachusetts D + 12 Elizabeth Warren ( D ) 54 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Michigan D + 1 Debbie Stabenow ( D ) 59 % D Likely D Safe D Likely D Likely D Likely D Likely D Likely D Likely D Minnesota D + 1 Amy Klobuchar ( D ) 65 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Minnesota ( Special ) D + 1 Tina Smith ( D ) 53 % D Lean D Likely D Likely D Lean D Likely D Lean D Likely D Likely D Mississippi R + 9 Roger Wicker ( R ) 57 % R Safe R Safe R Safe R Safe R Safe R Safe R Likely R Safe R Mississippi ( Special ) R + 9 Cindy Hyde - Smith ( R ) 60 % R Likely R Safe R Likely R Likely R Safe R Likely R Likely R Likely R Missouri R + 9 Claire McCaskill ( D ) 55 % D Tossup Tossup Tossup Tossup Tossup Tossup Tossup Tossup Montana R + 11 Jon Tester ( D ) 49 % D Likely D Tilt D Lean D Likely D Lean D Lean D Lean D Tossup Nebraska R + 14 Deb Fischer ( R ) 56 % R Likely R Safe R Safe R Likely R Safe R Safe R Likely R Safe R Nevada D + 1 Dean Heller ( R ) 46 % R Tossup Tossup Tossup Tossup Tossup Tossup Lean D ( flip ) Tossup New Jersey D + 7 Bob Menendez ( D ) 59 % D Likely D Safe D Likely D Likely D Safe D Lean D Likely D Likely D New Mexico D + 3 Martin Heinrich ( D ) 51 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D New York D + 11 Kirsten Gillibrand ( D ) 72 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D North Dakota R + 16 Heidi Heitkamp ( D ) 50 % D Tossup Tilt R ( flip ) Tossup Tossup Tossup Tossup Lean R ( flip ) Tossup Ohio R + 3 Sherrod Brown ( D ) 51 % D Lean D Likely D Likely D Lean D Lean D Likely D Lean D Lean D Pennsylvania EVEN Bob Casey Jr. ( D ) 54 % D Likely D Likely D Safe D Likely D Likely D Likely D Likely D Likely D Rhode Island D + 10 Sheldon Whitehouse ( D ) 64 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Tennessee R + 14 Bob Corker ( R ) ( Retiring ) 65 % R Tossup Lean R Lean R Tossup Lean R Tossup Tossup Lean R Texas R + 8 Ted Cruz ( R ) 57 % R Lean R Likely R Likely R Lean R Likely R Lean R Lean R Likely R Utah R + 20 Orrin Hatch ( R ) ( Retiring ) 65 % R Safe R Safe R Safe R Safe R Safe R Safe R Likely R Safe R Vermont D + 15 Bernie Sanders ( I ) 71 % I Safe D / I Safe D / I Safe D / I Safe D / I Safe D / I Safe D / I Likely D / I Safe D / I Virginia D + 1 Tim Kaine ( D ) 53 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D Washington D + 7 Maria Cantwell ( D ) 61 % D Safe D Safe D Safe D Safe D Safe D Safe D Likely D Safe D West Virginia R + 20 Joe Manchin ( D ) 61 % D Tossup Tilt D Lean D Tossup Tossup Lean D Lean D Tossup Wisconsin EVEN Tammy Baldwin ( D ) 51 % D Likely D Lean D Likely D Likely D Lean D Lean D Likely D Lean D Wyoming R + 25 John Barrasso ( R ) 76 % R Safe R Safe R Safe R Safe R Safe R Safe R Likely R Safe R Election dates For the regularly scheduled general elections. Shading added for future events. State Filing deadline Primary election Primary run - off ( if necessary ) General election Poll closing ( Eastern Time ) Arizona May 30, 2018 August 28, 2018 N / A November 6, 2018 9pm California March 9, 2018 June 5, 2018 N / A November 6, 2018 11pm Connecticut June 12, 2018 August 14, 2018 N / A November 6, 2018 8pm Delaware July 10, 2018 September 6, 2018 N / A November 6, 2018 8pm Florida May 4, 2018 August 28, 2018 N / A November 6, 2018 7pm & 8pm Hawaii June 5, 2018 August 11, 2018 N / A November 6, 2018 11pm Indiana February 9, 2018 May 8, 2018 N / A November 6, 2018 6pm & 7pm Maine March 15, 2018 June 12, 2018 N / A November 6, 2018 8pm Maryland February 27, 2018 June 26, 2018 N / A November 6, 2018 8pm Massachusetts June 5, 2018 September 4, 2018 N / A November 6, 2018 8pm Michigan April 24, 2018 August 7, 2018 N / A November 6, 2018 8pm & 9pm Minnesota June 5, 2018 August 14, 2018 N / A November 6, 2018 9pm Mississippi March 1, 2018 June 5, 2018 June 26, 2018 November 6, 2018 8pm Mississippi ( Special ) March 26, 2018 November 6, 2018 N / A November 27, 2018 8pm Missouri March 27, 2018 August 7, 2018 N / A November 6, 2018 8pm Montana March 12, 2018 June 5, 2018 N / A November 6, 2018 10pm Nebraska March 1, 2018 May 15, 2018 N / A November 6, 2018 9pm Nevada March 16, 2018 June 12, 2018 N / A November 6, 2018 10pm New Jersey April 2, 2018 June 5, 2018 N / A November 6, 2018 8pm New Mexico March 13, 2018 June 5, 2018 N / A November 6, 2018 9pm New York April 12, 2018 June 26, 2018 N / A November 6, 2018 9pm North Dakota April 9, 2018 June 12, 2018 N / A November 6, 2018 10pm & 11pm Ohio February 7, 2018 May 8, 2018 N / A November 6, 2018 7 : 30pm Pennsylvania March 20, 2018 May 15, 2018 N / A November 6, 2018 8pm Rhode Island June 27, 2018 September 12, 2018 N / A November 6, 2018 8pm Tennessee April 5, 2018 August 2, 2018 N / A November 6, 2018 8pm Texas December 11, 2017 March 6, 2018 May 22, 2018 ( Unnecessary ) November 6, 2018 8pm & 9pm Utah March 15, 2018 June 26, 2018 N / A November 6, 2018 10pm Vermont May 31, 2018 August 14, 2018 N / A November 6, 2018 7pm Virginia March 29, 2018 June 12, 2018 N / A November 6, 2018 7pm Washington May 18, 2018 August 7, 2018 N / A November 6, 2018 11pm West Virginia January 27, 2018 May 8, 2018 N / A November 6, 2018 7 : 30pm Wisconsin June 1, 2018 August 14, 2018 N / A November 6, 2018 9pm Wyoming June 1, 2018 August 21, 2018 N / A November 6, 2018 9pm Race summary Special elections during the preceding Congress In these special elections, the winners will be elected coincidingly with the other races of the 2018 Senate elections, but will be seated before January 3, 2019, when elected and qualified. Ordered by election date, then by state, then by class. State ( linked to summaries below ) Incumbent Results Candidates Senator Party Electoral history Minnesota ( Class 2 ) Tina Smith Democratic 2018 ( Appointed ) Interim appointee nominated to finish the term. Special election scheduled November 6, 2018. Karin Housley ( Republican ) Tina Smith ( Democratic ) Jerry Trooien ( Independent ) Sarah Wellington ( Legal Marijuana Now ) Mississippi ( Class 2 ) Cindy Hyde - Smith Republican 2018 ( Appointed ) Interim appointee nominated to finish the term. Special election scheduled November 6, 2018. If no candidate receives a majority, a run - off will be held November 27, 2018 Tobey Bartee ( Democratic ) Mike Espy ( Democratic ) Cindy Hyde - Smith ( Republican ) Chris McDaniel ( Republican ) Elections leading to the next Congress In these general elections, the winners will be elected for the term beginning January 3, 2019. All of the elections involve the Class 1 seats ; ordered by state. State ( linked to summaries below ) Incumbent Results Candidates Senator Party Electoral history Arizona Jeff Flake Republican 2012 Incumbent retiring. New senator to be elected. Eve Reyes Aguirre ( Green ) Adam Kokesh ( Libertarian ) Martha McSally ( Republican ) Kyrsten Sinema ( Democratic ) California Dianne Feinstein Democratic 1992 ( Special ) 1994 2000 2006 2012 Incumbent renominated. Kevin de León ( Democratic ) Dianne Feinstein ( Democratic ) Connecticut Chris Murphy Democratic 2012 Incumbent renominated. Matthew Corey ( Republican ) Chris Murphy ( Democratic ) Delaware Tom Carper Democratic 2000 2006 2012 Incumbent running. Robert Arlett ( Republican ) Tom Carper ( Democratic ) Kerri Evelyn Harris ( Democratic ) Gene Truono ( Republican ) Florida Bill Nelson Democratic 2000 2006 2012 Incumbent renominated. Bill Nelson ( Democratic ) Rick Scott ( Republican ) Hawaii Mazie Hirono Democratic 2012 Incumbent renominated. Ron Curtis ( Republican ) Mazie Hirono ( Democratic ) Arturo Reyes ( Independent ) Indiana Joe Donnelly Democratic 2012 Incumbent renominated. Lucy Brenton ( Libertarian ) Mike Braun ( Republican ) Joe Donnelly ( Democratic ) Maine Angus King Independent 2012 Incumbent on ballot. Eric Brakey ( Republican ) Angus King ( Independent ) Zak Ringelstein ( Democratic ) Maryland Ben Cardin Democratic 2006 2012 Incumbent renominated. Tony Campbell ( Republican ) Ben Cardin ( Democratic ) Neal Simon ( Independent ) Edward Shlikas ( Independent ) Arvin Vohra ( Libertarian ) Massachusetts Elizabeth Warren Democratic 2012 Incumbent running. Shiva Ayyadurai ( Independent ) Geoff Diehl ( Republican ) John Kingston ( Republican ) Beth Lindstrom ( Republican ) Elizabeth Warren ( Democratic ) Michigan Debbie Stabenow Democratic 2000 2006 2012 Incumbent renominated. John James ( Republican ) Marcia Squier ( Independent ) Debbie Stabenow ( Democratic ) Minnesota Amy Klobuchar Democratic 2006 2012 Incumbent renominated. Amy Klobuchar ( Democratic ) Jim Newberger ( Republican ) Paula M. Overby ( Green ) Dennis Schuller ( Legal Marijuana Now ) Mississippi Roger Wicker Republican 2007 ( Appointed ) 2008 ( Special ) 2012 Incumbent renominated. David Baria ( Democratic ) Danny Bedwell ( Libertarian ) Shawn O'Hara ( Reform ) Roger Wicker ( Republican ) Missouri Claire McCaskill Democratic 2006 2012 Incumbent renominated. Japheth Campbell ( Libertarian ) Josh Hawley ( Republican ) Claire McCaskill ( Democratic ) Montana Jon Tester Democratic 2006 2012 Incumbent renominated. Rick Breckenridge ( Libertarian ) Matthew Rosendale ( Republican ) Jon Tester ( Democratic ) Nebraska Deb Fischer Republican 2012 Incumbent renominated. Deb Fischer ( Republican ) Jane Raybould ( Democratic ) Jim Schultz ( Libertarian ) Nevada Dean Heller Republican 2011 ( Appointed ) 2012 Incumbent renominated. Kamau Bakari ( Independent American ) Tim Hagan ( Libertarian ) Dean Heller ( Republican ) Barry Michaels ( Independent ) Jacky Rosen ( Democratic ) New Jersey Bob Menendez Democratic 2006 ( Appointed ) 2006 2012 Incumbent renominated. Bob Hugin ( Republican ) Bob Menendez ( Democratic ) Murray Sabrin ( Libertarian ) New Mexico Martin Heinrich Democratic 2012 Incumbent renominated. Gary Johnson ( Libertarian ) Martin Heinrich ( Democratic ) Mick Rich ( Republican ) New York Kirsten Gillibrand Democratic 2009 ( Appointed ) 2010 ( Special ) 2012 Incumbent renominated. Chele Chiavacci Farley ( Republican ) Kirsten Gillibrand ( Democratic ) North Dakota Heidi Heitkamp Democratic 2012 Incumbent renominated. Kevin Cramer ( Republican ) Heidi Heitkamp ( Democratic ) Ohio Sherrod Brown Democratic 2006 2012 Incumbent renominated. Sherrod Brown ( Democratic ) Philena Irene Farley ( Green, write - in ) Jim Renacci ( Republican ) Pennsylvania Bob Casey Jr. Democratic 2006 2012 Incumbent renominated. Lou Barletta ( Republican ) Bob Casey Jr. ( Democratic ) Rhode Island Sheldon Whitehouse Democratic 2006 2012 Incumbent running. Robert Flanders ( Republican ) Sheldon Whitehouse ( Democratic ) Tennessee Bob Corker Republican 2006 2012 Incumbent retiring. New senator to be elected. Marsha Blackburn ( Republican ) Phil Bredesen ( Democratic ) Texas Ted Cruz Republican 2012 Incumbent renominated. Ted Cruz ( Republican ) Neal Dikeman ( Libertarian ) Beto O'Rourke ( Democratic ) Utah Orrin Hatch Republican 1976 1982 1988 1994 2000 2006 2012 Incumbent retiring. New senator to be elected. Tim Aalders ( Constitution ) Craig Bowden ( Libertarian ) Ryan Daniel Jackson ( Write - in ) Reed McCandless ( Independent American ) Caleb Dan Reeve ( Write - in ) Mitt Romney ( Republican ) Jenny Wilson ( Democratic ) Vermont Bernie Sanders Independent 2006 2012 Incumbent renominated as Democratic nominee, but run as independent in general election. Brooke Paige ( Republican ) Bernie Sanders ( Independent ) Virginia Tim Kaine Democratic 2012 Incumbent renominated. Tim Kaine ( Democratic ) Corey Stewart ( Republican ) Matt Waters ( Libertarian ) Washington Maria Cantwell Democratic 2000 2006 2012 Incumbent renominated. Maria Cantwell ( Democratic ) Susan Hutchison ( Republican ) West Virginia Joe Manchin Democratic 2010 ( Special ) 2012 Incumbent renominated. Joe Manchin ( Democratic ) Patrick Morrisey ( Republican ) Wisconsin Tammy Baldwin Democratic 2012 Incumbent renominated. Tammy Baldwin ( Democratic ) Leah Vukmir ( Republican ) Wyoming John Barrasso Republican 2007 ( Appointed ) 2008 ( Special ) 2012 Incumbent renominated. John Barrasso ( Republican ) Dave Dodson ( Independent ) Gary Trauner ( Democratic ) Arizona Arizona election ← 2012 2024 → Nominee Martha McSally Krysten Sinema Party Republican Democratic Incumbent U.S. Senator Jeff Flake Republican Main article : United States Senate election in Arizona, 2018 See also : List of United States Senators from Arizona One - term Republican Jeff Flake was elected with 49 % of the vote in 2012. He has declared he will retire at the end of his term. U.S. Representative Martha McSally won the Republican nomination in a three - way primary on August 28, 2018, against Joe Arpaio and Kelli Ward. U.S. Representative Kyrsten Sinema easily secured the Democratic nomination. Eve Reyes Aguirre is running as a Green Party candidate. California California election ← 2012 2024 → Nominee Dianne Feinstein Kevin de León Party Democratic Democratic Incumbent U.S. Senator Dianne Feinstein Democratic Main article : United States Senate election in California, 2018 See also : List of United States Senators from California Four - term Democrat Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She is running for re-election and will advance to the general election after securing the top spot in the June 5 jungle primary. President pro tempore of the California State Senate Kevin de León will advance to the general election after securing the second spot in the June 5 primary. Other Democratic candidates included community advocate Adrienne Nicole Edwards, Eugene Patterson Harris, David Hildebrand, Douglas Howard Pierce, and Alison Hartson. Republican candidates included Paul Allen Taylor. Derrick Michael Reid ran with the Libertarian Party. Independent candidates included biologist Tim Gildersleeve, Lee W. Olson, and evangelist Ling Ling Shi. Connecticut Connecticut election ← 2012 2024 → Nominee Chris Murphy Matthew Corey Party Democratic Republican Incumbent U.S. Senator Chris Murphy Democratic Main article : United States Senate election in Connecticut, 2018 See also : List of United States Senators from Connecticut One - term Democrat Chris Murphy was elected with 55 % of the vote in 2012. He is running for re-election. Businessmen Matthew Corey received the Republican nomination. Delaware Main article : United States Senate election in Delaware, 2018 See also : List of United States Senators from Delaware Three - term Democrat Tom Carper won re-election with 66 % of the vote in 2012. He announced he was running for re-election during an interview on MSNBC on July 24, 2017. He will be challenged by Kerri Evelyn Harris for the Democratic nomination. Sussex County Councilman Robert Arlett and Businessman Gene Truono are running for the Republican nomination. Florida Florida election ← 2012 2024 → Nominee Bill Nelson Rick Scott Party Democratic Republican Incumbent U.S. Senator Bill Nelson Democratic Main article : United States Senate election in Florida, 2018 See also : List of United States Senators from Florida Three - term Democrat Bill Nelson was re-elected with 55 % of the vote in 2012. He is seeking re-election to a fourth term in office. Florida Governor Rick Scott garnered the Republican nomination. First elected in 2010 and re-elected in 2014, Scott 's term as Governor of Florida is set to end by January 2019, due to term limits. Edward Janowski is running as an independent. Hawaii Hawaii election ← 2012 2024 → Nominee Mazie Hirono Ron Curtis Party Democratic Republican Incumbent U.S. Senator Mazie Hirono Democratic Main article : United States Senate election in Hawaii, 2018 See also : List of United States Senators from Hawaii One - term Democrat Mazie Hirono was elected with 63 % of the vote in 2012. She is running. Ron Curtis is the Republican nominee. Indiana Indiana election ← 2012 2024 → Nominee Joe Donnelly Mike Braun Party Democratic Republican Incumbent U.S. Senator Joe Donnelly Democratic Main article : United States Senate election in Indiana, 2018 See also : List of United States Senators from Indiana One - term Democrat Joe Donnelly was elected with 50.04 % of the vote in 2012. He is running. He won the Democratic primary unopposed. State Representative Mike Braun won the May 8 Republican primary. U.S. Representatives Luke Messer and Todd Rokita also ran for the Republican nomination. James Johnson is running as an independent. Maine Maine election ← 2012 2024 → Nominee Angus King Eric Brakey Zak Ringelstein Party Independent Republican Democratic Incumbent U.S. Senator Angus King Independent Main article : United States Senate election in Maine, 2018 See also : List of United States Senators from Maine 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. King is running. State Senator Eric Brakey ran unopposed for the Republican nomination. Public school teacher and founder of UClass Zak Ringelstein ran unopposed for the Democratic nomination. The election will be conducted with ranked choice voting, as opposed to `` First - past - the - post voting '', after Maine voters passed a citizen referendum approving the change in 2016 and a June 2018 referendum sustaining the change.. Maryland Maryland election ← 2012 2024 → Nominee Ben Cardin Tony Campbell Party Democratic Republican Incumbent U.S. Senator Ben Cardin Democratic Main article : United States Senate election in Maryland, 2018 See also : List of United States Senators from Maryland Two - term Democrat Ben Cardin was re-elected with 56 % of the vote in 2012. He won the Democratic primary. Tony Campbell, Evan Cronhardt, Nnabu Eze, Gerald Smith, and Blaine Taylor were seeking the Republican nomination, With Campbell winning. Arvin Vohra, vice chairman of the Libertarian National Committee, is seeking the Libertarian Party nomination. Independents Neal Simon and Edward Shlikas are running. Massachusetts Main article : United States Senate election in Massachusetts, 2018 See also : List of United States Senators from Massachusetts One - term Democrat Elizabeth Warren was elected with 54 % of the vote in 2012. She is running. State Representative Geoff Diehl, attorney and founder of Better for America, John Kingston, former Romney aide Beth Lindstrom, are running for the Republican nomination. Shiva Ayyadurai is running as an independent. Shiva started as in early 2017 as the first Republican in the race, but went independent in November 2017. Michigan Michigan election ← 2012 2024 → Nominee Debbie Stabenow John James Party Democratic Republican Incumbent U.S. Senator Debbie Stabenow Democratic Main article : United States Senate election in Michigan, 2018 See also : List of United States Senators from Michigan Three - term Democrat Debbie Stabenow was re-elected with 59 % of the vote in 2012. She was renominated without Democratic opposition. On the Republican side, businessman John James was nominated. Independent candidate Marcia Squier is also running. She ran as a Green Party candidate for Michigan 's 14th congressional district in 2016. Minnesota Minnesota election ← 2012 2024 → Nominee Amy Klobuchar Jim Newberger Party Democratic Republican Incumbent U.S. Senator Amy Klobuchar Democratic Main article : United States Senate election in Minnesota, 2018 See also : List of United States Senators from Minnesota and United States Senate special election in Minnesota, 2018 Two - term Democrat Amy Klobuchar was re-elected with 65 % of the vote in 2012. She is running. State Representative Jim Newberger is running for the Republican nomination. Minnesota ( special ) Minnesota special election ← 2014 2020 → Nominee Tina Smith Karin Housley Party Democratic Republican Incumbent U.S. Senator Tina Smith Democratic Main article : United States Senate special election in Minnesota, 2018 See also : List of United States Senators from Minnesota and United States Senate election in Minnesota, 2018 Two - term Democrat Al Franken announced that he would resign in December 2017, following allegations of sexual harassment. Mark Dayton, Governor of Minnesota, appointed Lt. Gov. Tina Smith on January 2, 2018, as an interim Senator until the November 2018 election. She defeated primary challenger Richard Painter. Incumbent Tina Smith is running against Republican Karin Housley in the general election. Mississippi Mississippi election ← 2012 2024 → Nominee Roger Wicker David Baria Party Republican Democratic Incumbent U.S. Senator Roger Wicker Republican Main article : United States Senate election in Mississippi, 2018 See also : List of United States Senators from Mississippi and United States Senate special election in Mississippi, 2018 One - term Republican 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 is running. David Baria won the Democratic nomination in a run - off on June 26. Mississippi ( special ) Main article : United States Senate special election in Mississippi, 2018 See also : List of United States Senators from Mississippi and United States Senate election in Mississippi, 2018 Seven - term Republican Thad Cochran, who won re-election with 59.9 % of the vote in 2014, announced that he would resign April 1, 2018 due to health reasons. Phil Bryant, Governor of Mississippi, announced on March 21, 2018, that he would appoint Mississippi Agriculture Commissioner Cindy Hyde - Smith to fill the vacancy. She will be running in the special election. Former United States Secretary of Agriculture and member of the U.S. House of Representatives Mike Espy and Tobey Bartee are running as Democratic candidates. Republican Chris McDaniel is also running. Missouri Missouri election ← 2012 2024 → Nominee Claire McCaskill Josh Hawley Japheth Campbell Party Democratic Republican Libertarian Incumbent U.S. Senator Claire McCaskill Democratic Main article : United States Senate election in Missouri, 2018 See also : List of United States Senators from Missouri Two - term Democrat Claire McCaskill was re-elected with 55 % of the vote in 2012. She was renominated. Attorney General Josh Hawley won the Republican nomination. Japheth Campbell has declared his candidacy for the Libertarian nomination. Montana Montana election ← 2012 2024 → Nominee Jon Tester Matt Rosendale Party Democratic Republican Incumbent U.S. Senator Jon Tester Democratic Main article : United States Senate election in Montana, 2018 See also : List of United States Senators from Montana Two - term Democrat Jon Tester was re-elected with 49 % of the vote in 2012. He won the Democratic nomination in the June 5 primary with no opposition. State Auditor Matthew Rosendale won the Republican nomination in the June 5 primary. State Senator Albert Olszewski, former judge Russell Fagg, and Troy Downing also ran for the Republican nomination. Nebraska Nebraska election ← 2012 2024 → Nominee Deb Fischer Jane Raybould Party Republican Democratic Incumbent U.S. Senator Deb Fischer Republican Main article : United States Senate election in Nebraska, 2018 See also : List of United States Senators from Nebraska One - term Republican Deb Fischer was elected with 58 % of the vote in 2012. She ran for and won the Republican nomination in the May 15 primary. Other Republicans who ran include retired professor Jack Heidel, Todd Watson, and Dennis Frank Macek. Lincoln Councilwoman Jane Raybould ran for and won the Democratic nomination in the May 15 primary. Other Democrats who ran include Frank Svoboda, Chris Janicek, and Larry Marvin, who was a candidate in 2008, 2012, and 2014. Jim Schultz is running for the Libertarian nomination. Nevada Nevada election ← 2012 2024 → Nominee Dean Heller Jacky Rosen Party Republican Democratic Incumbent U.S. Senator Dean Heller Republican Main article : United States Senate election in Nevada, 2018 See also : List of United States Senators from Nevada Incumbent Republican Dean Heller is the Republican nominee. He was appointed to the seat in 2011 and then elected with 46 % of the vote in 2012. Heller considered running for governor, but chose to seek re-election. Nevada is the only state in the midterm elections that has an incumbent Republican Senator in a state that Hillary Clinton won in 2016. Representative Jacky Rosen is the Democratic nominee. New Jersey New Jersey election ← 2012 2024 → Nominee Bob Menendez Bob Hugin Party Democratic Republican Incumbent U.S. Senator Bob Menendez Democratic Main article : United States Senate election in New Jersey, 2018 See also : List of United States Senators from New Jersey Republican Bob Hugin was nominated to face two - term Democrat Bob Menendez, who was re-elected with 59 % of the vote in 2012. Menendez was originally appointed to the seat in January 2006. He is running. New Mexico New Mexico election ← 2012 2024 → Nominee Martin Heinrich Mick Rich Gary Johnson Party Democratic Republican Libertarian Incumbent U.S. Senator Martin Heinrich Democratic Main article : United States Senate election in New Mexico, 2018 See also : List of United States Senators from New Mexico One - term Democrat Martin Heinrich was elected with 51 % of the vote in 2012. He is running. Mick Rich won the Republican nomination unopposed. Aubrey Dunn Jr., New Mexico Commissioner of Public Lands and otherwise the first Libertarian to ever hold statewide elected office in history, announced his run for the seat, but stepped aside in August to allow former Governor of New Mexico, Gary Johnson 's candidacy. New York New York election ← 2012 2024 → Nominee Kirsten Gillibrand Chele Chiavacci Farley Party Democratic Republican Incumbent U.S. Senator Kirsten Gillibrand Democratic Main article : United States Senate election in New York, 2018 See also : List of United States Senators from New York One - term Democrat 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 is running. Private equity executive Chele Chiavacci Farley has been nominated for U.S. Senate by the Republican and Conservative Parties. North Dakota North Dakota election ← 2012 2024 → Nominee Heidi Heitkamp Kevin Cramer Party Democratic Republican Incumbent U.S. Senator Heidi Heitkamp Democratic Main article : United States Senate election in North Dakota, 2018 See also : List of United States Senators from North Dakota One - term Democrat Heidi Heitkamp was elected with 50 % of the vote in 2012. She won the Democratic nomination unopposed. Congressman Kevin Cramer won the Republican nomination in the June 12 primary. Former Niagara, North Dakota Mayor Thomas O'Neill also ran for the Republican nomination. Ohio Ohio election ← 2012 2024 → Nominee Sherrod Brown Jim Renacci Party Democratic Republican Incumbent U.S. Senator Sherrod Brown Democratic Main article : United States Senate election in Ohio, 2018 See also : List of United States Senators from Ohio Two - term Democrat Sherrod Brown was re-elected with 51 % of the vote in 2012. He is running and was unopposed in Democratic primary. U.S. Representative Jim Renacci ran for and won the Republican nomination in the May 8 primary. Other Republicans who ran include investment banker Michael Gibbons, businesswoman Melissa Ackison, Dan Kiley, and Don Elijah Eckhart. Pennsylvania Pennsylvania election ← 2012 2024 → Nominee Bob Casey Jr. Lou Barletta Party Democratic Republican Incumbent U.S. Senator Bob Casey Jr. Democratic Main article : United States Senate election in Pennsylvania, 2018 See also : List of United States Senators from Pennsylvania Two - term Democrat Bob Casey Jr. was re-elected with 54 % of the vote in 2012. He is running and won the Democratic primary unopposed. U.S. Representative Lou Barletta ran for and won the Republican nomination in the May 15 primary. Jim Christiana also ran for the Republican nomination. Rhode Island Main article : United States Senate election in Rhode Island, 2018 See also : List of United States Senators from Rhode Island Two - term Democrat Sheldon Whitehouse was re-elected with 64 % of the vote in 2012. He is running. Former Rhode Island Supreme Court Associate Justice Robert Flanders is running for the Republican nomination. Tennessee Tennessee election ← 2012 2024 → Nominee Marsha Blackburn Phil Bredesen Party Republican Democratic Incumbent U.S. Senator Bob Corker Republican Main article : United States Senate election in Tennessee, 2018 See also : List of United States Senators from Tennessee Two - term Republican Bob Corker was re-elected with 65 % of the vote in 2012. Senator Corker filed his Statement of Candidacy with the Secretary of the U.S. Senate to run for re-election, but on September 26, 2017, Senator Corker announced his intent to retire. Aaron Pettigrew and Republican U.S. Representative Marsha Blackburn ran for the Republican nomination. Marsha Blackburn is the Republican nominee. Former Tennessee Governor Phil Bredesen is the Democratic nominee. Texas Texas election ← 2012 2024 → Nominee Ted Cruz Beto O'Rourke Party Republican Democratic Incumbent U.S. Senator Ted Cruz Republican Main article : United States Senate election in Texas, 2018 See also : List of United States Senators from Texas One - term Republican Ted Cruz was elected with 57 % of the vote in 2012. He overwhelmingly won the Republican primary on March 6, 2018. Television producer Bruce Jacobson, Houston energy attorney Stefano de Stefano, former mayor of La Marque Geraldine Sam, Mary Miller, and Thomas Dillingham were Cruz 's opponents. U.S. Representative Beto O'Rourke won the Democratic nomination on March 6, 2018. Other Democrats who ran include Irasema Ramirez Hernandez and Edward Kimbrough. Nurse Carl Bible ran as an independent. Bob McNeil ran with the American Citizen Party. Utah Utah election ← 2012 2024 → Nominee Mitt Romney Jenny Wilson Party Republican Democratic Incumbent U.S. Senator Orrin Hatch Republican Main article : United States Senate election in Utah, 2018 See also : List of United States Senators from Utah Seven - term Republican Orrin Hatch was re-elected with 65 % of the vote in 2012. Hatch is the President pro tempore of the United States Senate, as well as the second most - senior Senator. Before the 2012 election, Hatch said that he would retire at the end of his seventh term if he was re-elected. Hatch initially announced his re-election campaign on March 9, 2017, but later announced his plans to retire on January 2, 2018. Former Republican presidential nominee Mitt Romney is running for the seat. Professor James Singer was running for the Democratic nomination, but he dropped out and endorsed Salt Lake County Councilwoman Jenny Wilson, who made her Senate bid official on July 17, 2017. Danny Drew also was running, but dropped out and endorsed Jenny Wilson. Mitchell Kent Vice was defeated for the Democratic nomination by Wilson. Vermont Vermont election ← 2012 2024 → Nominee Bernie Sanders Brooke Paige Party Independent Republican Incumbent U.S. Senator Bernie Sanders Independent Main article : United States Senate election in Vermont, 2018 See also : List of United States Senators from Vermont Two - term Independent Senator Bernie Sanders was re-elected with 71 % of the vote in 2012. Sanders, one of two independent members of Congress, has caucused with the Democratic Party since taking office in 2007. In November 2015, Sanders announced his plans to run as a Democrat, rather than an Independent, in all future elections. He won the nomination easily. Virginia Virginia election ← 2012 2024 → Nominee Tim Kaine Corey Stewart Party Democratic Republican Incumbent U.S. Senator Tim Kaine Democratic Main article : United States Senate election in Virginia, 2018 See also : List of United States Senators from Virginia One - term Democrat Tim Kaine was elected with 53 % of the vote in 2012. He was re-nominated unopposed. Prince William County Supervisor Corey Stewart is the Republican nominee. Matt Waters is the Libertarian nominee. Washington Washington election ← 2012 2024 → Nominee Maria Cantwell Susan Hutchison Party Democratic Republican Incumbent U.S. Senator Maria Cantwell Democratic Main article : United States Senate election in Washington, 2018 See also : List of United States Senators from Washington Three - term Democrat Maria Cantwell was re-elected with 61 % of the vote in 2012. She is running. Washington hold non-partisan blanket primaries, in which the top two finishers advance to the general election regardless of party. Cantwell and former state Republican Party chair Susan Hutchison are facing each other in November. West Virginia West Virginia election ← 2012 2024 → Nominee Joe Manchin Patrick Morrisey Party Democratic Republican Incumbent U.S. Senator Joe Manchin Democratic Main article : United States Senate election in West Virginia, 2018 See also : List of United States Senators from West Virginia One - term Democrat 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 and won the May 8 Democratic primary. Environmental activist Paula Jean Swearengin, also ran for the Democratic nomination. West Virginia Attorney General Patrick Morrisey received the Republican nomination in the May 8 primary. Representative Evan Jenkins, coal miner Bo Copley, Jack Newbrough, Don Blankenship, and Tom Willis ran for the Republican nomination. Wisconsin Wisconsin election ← 2012 2024 → Nominee Tammy Baldwin Leah Vukmir Party Democratic Republican Incumbent U.S. Senator Tammy Baldwin Democratic Main article : United States Senate election in Wisconsin, 2018 See also : List of United States Senators from Wisconsin One - term Democrat Tammy Baldwin was elected with 51 % of the vote in 2012. She is running. State Senator Leah Vukmir and businessman and member of Wisconsin Board of Veterans Affairs Kevin Nicholson are running for the Republican nomination. Wyoming Wyoming Election ← 2012 2024 → Nominee John Barrasso Gary Trauner Party Republican Democratic Incumbent U.S. Senator John Barrasso Republican Main article : United States Senate election in Wyoming, 2018 See also : List of United States Senators from Wyoming One - term Republican 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. He is running. 59 year old Gary Trauner, a Jackson Hole businessman and U.S. House candidate in 2006 and 2008, is the Democratic nominee. See also United States gubernatorial elections, 2018 Notes Jump up ^ Including the United States Senate special election in Mississippi, 2018 Jump up ^ Including the United States Senate special election in Minnesota, 2018 Jump up ^ Mississippi will hold a run - off for the special election on November 27, 2018, if no one candidate wins a majority of the vote in the November 6, 2018 jungle primary. Jump up ^ Maine Independents do not get `` nominated. '' References Jump up ^ Michael Wines ( October 14, 2017 ). `` Wary of Hackers, States Move to Upgrade Voting Systems ''. Nytimes.com. Retrieved October 17, 2017. ^ Jump up to : Dick, Jason ( January 20, 2016 ). `` Senate Democrats, 2018 Math Is Not Your Friend ''. Roll Call. Retrieved August 2, 2016. Jump up ^ Livingston, Abby ( January 6, 2017 ). `` Rep. Beto O'Rourke `` very likely '' to run for Sen. Ted Cruz 's seat in 2018 ``. The Texas Tribune. Retrieved January 19, 2017. Jump up ^ Pramuk, Jacob ( September 26, 2017 ). `` Republican Sen. Bob Corker of Tennessee will not seek re-election, long - shot opportunity for Democrats ''. CNBC. Retrieved September 26, 2017. Jump up ^ Kondik, Kyle ( July 25, 2013 ). `` Senate 2014 and Beyond ''. Sabato 's Crystal Ball. Retrieved September 19, 2013. Jump up ^ Fram, Alan ( November 11, 2016 ). `` Several Democrats facing 2018 re-election are from states Trump carried ''. PBS NewsHour. Retrieved November 12, 2016. Jump up ^ Bobic, Igor ( November 5, 2014 ). `` Independent Angus King Will Continue To Caucus With Senate Democrats ''. Huffington Post. Retrieved November 6, 2014. Jump up ^ Gaudiano, Nicole ( October 23, 2014 ). `` Bernie Sanders to caucus with GOP ? Fat chance, he says ''. USA Today. Retrieved November 6, 2014. Jump up ^ `` 2016 State PVI Changes -- Decision Desk HQ ''. decisiondeskhq.com. December 15, 2017. Jump up ^ `` 2018 Senate Race Ratings ''. Cook Political Report. August 3, 2018. Jump up ^ `` Senate Ratings ''. Inside Elections. January 5, 2018. Jump up ^ `` 2017 - 2018 Crystal Ball Senate race ratings map ''. University of Virginia Center for Politics. May 9, 2018. Jump up ^ `` 2018 Election Calendar and Results ''. The New York Times. Retrieved January 24, 2018. Jump up ^ `` CNN Key Races : Democrats ' tough Senate map ''. CNN. Retrieved January 30, 2018. Jump up ^ `` Battle for the Senate 2018 ''. RCP. Retrieved March 28, 2018. Jump up ^ `` Fox News Midterms 2018 America 's Election HQ ''. Fox News. Retrieved June 12, 2018. Jump up ^ `` Daily Kos Elections 2018 race ratings ''. Daily Kos. July 27, 2018. Jump up ^ Note : Special elections in Mississippi are nonpartisan. Party affiliation is not listed on the ballot. Jump up ^ `` Daily Kos Elections 2018 Primary Calendar ''. Daily Kos Elections. Retrieved January 30, 2018. ^ Jump up to : `` 2018 Primary and Runoff Elections for Statewide offices and Congress Chronologically with Filing Deadlines ''. The Green Papers. Retrieved November 14, 2017. Jump up ^ `` 2018 Poll Closing Times for Statewide office and Congress General Election Chronologically ''. The Green Papers. Retrieved November 14, 2017. ^ Jump up to : `` Candidate Filings - 2018 State General Election ''. Minnesota Secretary of State. Retrieved May 31, 2018. ^ Jump up to : `` 2018 Mississippi Candidate Qualifying List '' ( PDF ). Mississippi Secretary of State. Retrieved March 24, 2018. ^ Jump up to : `` 2018 Primary Election ''. Arizona Secretary of State. Retrieved May 25, 2018. ^ Jump up to : `` California Candidate List '' ( PDF ). California Secretary of State. Retrieved March 24, 2018. ^ Jump up to : Altimari, Danielle ( August 22, 2017 ). `` Corey Planning U.S. Senate Run Against Murphy ''. Hartford Courant. Retrieved August 22, 2017. ^ Jump up to : Bass, Paul ( December 23, 2016 ). `` Murphy Navigates A Changed World ''. New Haven Independent. Retrieved December 29, 2016. ^ Jump up to : `` Kailani Koenig on Twitter ''. July 24, 2017. Retrieved July 24, 2017. Jump up ^ `` United States Senate election in Delaware, 2018 ''. Wikipedia. April 28, 2018. Jump up ^ Mueller, Sarah. `` Kerri Harris challenges Carper in September primary ''. Retrieved March 11, 2018. ^ Jump up to : `` Candidate Listing for 2018 General Election ''. Florida Department of State. Retrieved April 10, 2018. ^ Jump up to : `` Candidates Filing Report ''. Hawaii Office of Election. Retrieved June 3, 2018. ^ Jump up to : `` Indiana Secretary of State Official Candidates '' ( PDF ). Indiana Secretary of State. February 10, 2018. Retrieved February 10, 2018. ^ Jump up to : `` Maine Candidates Lists ''. Lieutenant Governor Election. Retrieved March 17, 2018. ^ Jump up to : `` Maine General Election Candidates List ''. Maine Secretary os State. Retrieved June 8, 2018. ^ Jump up to : Elections, Maryland State Board of. `` 2018 Candidate Listing ''. elections.state.md.us. Retrieved January 16, 2018. ^ Jump up to : `` Independent to launch bid for Senate in Maryland ''. POLITICO. Retrieved February 8, 2018. ^ Jump up to : `` Shlikas will fix it ! ''. Shlikas for Senate. Retrieved December 20, 2017. ^ Jump up to : `` Dr. Shiva Ayyadurai on Twitter : `` Today Shiva 4 Senate dumped the MA GOP Establishment and Declared Our Independence ''. Twitter. November 11, 2017. Retrieved November 11, 2017. ^ Jump up to : `` 2018 State Primary - Republican Candidates for Nomination ''. Secretary of the Commonwealth of Massachusetts. Retrieved June 6, 2018. ^ Jump up to : `` 2018 State Primary - Democratic Candidates for Nomination ''. Secretary of the Commonwealth of Massachusetts. Retrieved June 6, 2018. ^ Jump up to : `` 2018 Michigan Candidate Listing ''. Michigan Secretary of State. Retrieved April 24, 2018. Jump up ^ `` Who 's running for Congress in Michigan ? Here 's what we know ''. Detroit Free Press. Retrieved May 5, 2018. Jump up ^ Johnson, Ruth ( August 22, 2017 ). `` State of Michigan Political Party Status '' ( PDF ). State of Michigan. ^ Jump up to : `` Missouri Candidates Lists ''. Missouri Secretary of State. Retrieved March 17, 2018. ^ Jump up to : `` Montana Primary Candidates Lists ''. Montana Secretary of state. ^ Jump up to : `` Official Nebraska Candidate Lists '' ( PDF ). Nebraska Secretary of State. March 1, 2018. Retrieved March 2, 2018. ^ Jump up to : `` Nevada Candidates Lists ''. Nevada Secretary of state. ^ Jump up to : `` Unofficial List Candidates of US Senate '' ( PDF ). New Jersey Election. Retrieved April 11, 2018. Jump up ^ `` Sabrin to Seek Libertarian Party Nomination for U.S. Senate - Insider NJ ''. Insider NJ. 2018 - 01 - 25. Retrieved 2018 - 06 - 28. ^ Jump up to : `` New Mexico Major Parties Candidates ''. KRWG.org. Retrieved March 26, 2018. ^ Jump up to : `` Who Filed Report ''. New York State Board of Election. Retrieved April 10, 2018. ^ Jump up to : `` 2018 Primary Contest Candidate List ''. North Dakota Secretary of State. Retrieved April 9, 2018. ^ Jump up to : `` Secretary of State Jon Husted Receives Statewide Candidate Petitions for May Primary ''. Ohio Secretary of State. Retrieved March 23, 2018. Jump up ^ `` FARLEY, PHILENA IRENE - Candidate overview ''. FEC.gov. Retrieved May 23, 2018. ^ Jump up to : `` Pennsylvania Candidates Lists ''. Pennsylvania Secretary of State. Retrieved March 20, 2018. ^ Jump up to : Gregg, Katherine ( December 22, 2016 ). `` Sen. Whitehouse : ' Plenty of opportunity for us to have fights with the president ' ''. The Providence Journal. Retrieved December 27, 2016. ^ Jump up to : `` FLANDERS, ROBERT MR - Candidate overview ''. FEC.gov. ^ Jump up to : `` Tennessee candidates Lists '' ( PDF ). Tennessee Secretary of State. Retrieved March 23, 2018. ^ Jump up to : Sullivan, Sean ( May 11, 2016 ). `` Ted Cruz files to run for reelection to the Senate in 2018 ''. The Washington Post. Retrieved July 25, 2016. Jump up ^ `` DIKEMAN, NEAL MONROE - Candidate overview ''. FEC.gov. Retrieved May 23, 2018. Jump up ^ `` Cruz Leads O'Rourke in New Senate Poll ''. amarillopioneer.com. Retrieved May 23, 2018. Jump up ^ Tracy, Abigail ( May 31, 2017 ). `` Meet the Kennedyesque Democrat trying to beat Ted Cruz ''. Vanity Fair. Retrieved July 13, 2017. ^ Jump up to : `` Utah Candidats Lists ''. Utah Lieutenant Governor Election. Retrieved March 13, 2018. Jump up ^ `` 2018 Candidates listing ''. Vermont Secretary of State. Retrieved May 25, 2018. ^ Jump up to : `` 2018 General Election Candidates listing ''. Vermont Secretary of State. Retrieved August 14, 2018. ^ Jump up to : `` Certified Candidates and Ballot Order for June 12, 2018 Primary Elections '' ( PDF ). Virginia Department of Elections. Retrieved April 5, 2018. Jump up ^ `` Waters For U.S. Senate -- The Virginian ''. Matt Waters for US Senate. Retrieved May 23, 2018. ^ Jump up to : `` 2018 Candidates Who Have Filed ''. Washington Secretary of State. Retrieved May 18, 2018. ^ Jump up to : `` West Virginia Candidates Lists '' ( PDF ). West Virginia Secretary of State. Retrieved March 4, 2018. ^ Jump up to : `` Candidate Tracking by Office '' ( PDF ). Wisconsin Election Commission. Retrieved June 11, 2018. ^ Jump up to : `` 2018 Primary Election Candidate Roster '' ( PDF ). Wyoming Secretary of State. Retrieved May 23, 2018. Jump up ^ Jeff Flake ( October 24, 2017 ). `` Flake Announces Senate Future ''. United States Senator Jeff Flake. Retrieved December 20, 2017. ^ Jump up to : `` Candidate List - 2018 Primary Election '' ( PDF ). Indiana Secretary of State. February 12, 2018. Retrieved February 12, 2018. Jump up ^ Blake, Aaron ( November 5, 2014 ). `` Angus King and Joe Manchin are sticking with the Democrats. Because, of course ''. Washington Post. Retrieved May 28, 2015. Jump up ^ `` Maine became the first state in the country Tuesday to pass ranked choice voting ''. Boston Globe. November 10, 2016. Retrieved November 17, 2016. Jump up ^ `` Maine Voters Overrule Their Leaders ''. The Atlantic. June 15, 2018. Retrieved June 24, 2018. Jump up ^ https://www.washingtonpost.com/election-results/maryland/?utm_term=.fe210adaf809 Jump up ^ `` Michigan 's 14th Congressional District election, 2016 - Ballotpedia ''. Retrieved March 12, 2018. Jump up ^ Jacobs, Ben ( March 5, 2018 ). `` Mississippi Senator Thad Cochran announces he is stepping down ''. the Guardian. Retrieved March 5, 2018. Jump up ^ Wagster Pettus, Emily ( April 23, 2018 ). `` 5 candidates now in special US Senate race in Mississippi ''. The Seattle Times. Retrieved June 30, 2018. ^ Jump up to : `` United States Senate election in Nevada, 2018 ''. Jump up ^ `` Larry Crim Announces U.S. Senate 2018 Race For Seat Held By Corker ''. chattanoogan.com. Retrieved February 21, 2017. Jump up ^ `` Corker to end Senate career with this term ''. Retrieved September 26, 2017. Jump up ^ `` Ted Cruz plans to run for re-election in 2018 ''. CNN. Retrieved November 22, 2016. Jump up ^ Wang, Jackie ( November 16, 2017 ). `` Christian TV producer challenging Sen. Ted Cruz in GOP primary ''. Dallas Morning News. Retrieved November 16, 2017. Jump up ^ `` Statement of Organization '' ( PDF ). FEC Form 1. June 9, 2017. Retrieved June 14, 2017. Jump up ^ Tinsley, Anna M. ( November 11, 2017 ). `` 2018 Election : First day of filing begins with a rush of candidates ''. Fort Worth Star - Telegram. Retrieved November 16, 2017. Jump up ^ `` MILLER, MARY ANN - Candidate overview ''. FEC.gov. Jump up ^ `` Former Birdville schools employee joins GOP race to unseat Sen. Ted Cruz ''. Star - Telegram. Retrieved December 1, 2017. Jump up ^ `` Texas democrat Beto O'Rourke announces bid to unseat Ted Cruz ''. Business Insider. Associated Press. Retrieved March 31, 2017. Jump up ^ `` HERNANDEZ, IRASEMA RAMIREZ - Candidate overview ''. FEC.gov. Jump up ^ Tinsley, Anna ( December 9, 2017 ). `` Deadline for 2018 primary ballot : Monday. Here 's who is already in the race ''. Fort Worth Star - Telegram. Retrieved December 17, 2017. Jump up ^ `` BIBLE, CARL ALEXANDER - Candidate overview ''. FEC.gov. Retrieved December 21, 2017. Jump up ^ `` AmericanCitizenParty.us ''. americancitizenparty.us. Jump up ^ Lederman, Josh ( March 3, 2012 ). `` Hatch will retire in 2018 if he wins reelection ''. The Hill. Jump up ^ Raju, Manu ( March 9, 2017 ). `` First on CNN : After lobbying from Trump, Orrin Hatch plans to run again ''. CNN. Retrieved March 11, 2017. Jump up ^ Dennis Romboy ( November 6, 2014 ). `` Sen. Orrin Hatch leaves door ajar for run in 2018 ''. Deseret News. Retrieved December 12, 2014. Jump up ^ Tanner, Courtney ( May 3, 2017 ). `` Navajo candidate announces bid as Democrat for Hatch 's seat ''. The Salt Lake Tribune. Retrieved June 13, 2017. Jump up ^ Breiner, Andrew ( June 21, 2017 ). `` Navajo Candidate Drops Out of Race Against Hatch ''. Roll Call. Retrieved June 21, 2017. Jump up ^ Schott, Bryan ( April 12, 2017 ). `` Another Democrat looking to knock off Hatch in 2008 ''. Utah Policy. Retrieved April 12, 2017. Jump up ^ `` Thank You ''. Danny Drew For U.S. Senate. Retrieved October 3, 2017. Jump up ^ http://christiannewswire.com/news/9627481257.html ( 2017 ← ) 2018 United States elections ( → 2019 ) U.S. Senate Arizona California Connecticut Delaware Florida Hawaii Indiana Maine Maryland Massachusetts Michigan Minnesota special Mississippi special 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 Alabama Alaska American Samoa Arizona 8th, special Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan 13th, special Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York 25th, special North Carolina North Dakota Northern Mariana Islands Ohio 12th, special Oklahoma Oregon Pennsylvania 18th, special 7th and 15th, special Rhode Island South Carolina South Dakota Tennessee Texas 27th, special Utah Vermont Virginia U.S. Virgin Islands Washington West Virginia Wisconsin Wyoming Governors Alabama Alaska Arizona Arkansas California Colorado Connecticut Florida Georgia Guam Hawaii Idaho Illinois Iowa Kansas Maine Maryland Massachusetts Michigan Minnesota Nebraska Nevada New Hampshire New Mexico New York Northern Mariana Islands Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas U.S. Virgin Islands Vermont Wisconsin Wyoming Mayoral Louisville Newark Newport News Oakland Phoenix San Francisco ( special ) San Jose Shreveport Washington, D.C. 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Question: how many republican seats are up for election in 2018
Answer: nine