United States Senate elections, 2018 - wikipedia United States Senate elections, 2018 United States Senate elections, 2018 ← 2016 November 6, 2018 2020 → Class 1 ( 33 of the 100 ) seats 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 51 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, as well as 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. The U.S. House of Representatives elections, 39 gubernatorial elections, and many other state and local elections will also be held on this date. Republicans can only afford to lose one Senate seat and still have a working majority with the Vice President breaking the tie in their favor. Four of the Republican seats are open as a result of retirements in Tennessee, Utah, Arizona, and Mississippi. 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 Partisan composition 2 Change in composition 2.1 Before the elections 2.2 After the elections 3 Most recent election predictions 4 Race summary 4.1 Special elections during the preceding Congress 4.2 Elections leading to the next Congress 5 Arizona 6 California 7 Connecticut 8 Delaware 9 Florida 10 Hawaii 11 Indiana 12 Maine 13 Maryland 14 Massachusetts 15 Michigan 16 Minnesota 17 Minnesota ( Special ) 18 Mississippi 19 Mississippi ( Special ) 20 Missouri 21 Montana 22 Nebraska 23 Nevada 24 New Jersey 25 New Mexico 26 New York 27 North Dakota 28 Ohio 29 Pennsylvania 30 Rhode Island 31 Tennessee 32 Texas 33 Utah 34 Vermont 35 Virginia 36 Washington 37 West Virginia 38 Wisconsin 39 Wyoming 40 See also 41 Notes 42 References 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. 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 → Running Running Running Running Running Running Retiring 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 Democrats are expected to target the Republican - held Senate seats in Arizona ( open seat ) and Nevada. Democrats could also target seats in Texas, Utah 's open - seat, 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. Republicans could also target seats in Minnesota ( at least one of the two seats ), Virginia, Maine, and New Jersey. Other races may also become competitive. 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 `` safe '' or `` solid '' : near - certain chance of victory. State PVI Incumbent Most recent result Cook Apr 9, 2018 I.E. Apr 9, 2018 Sabato Apr 11, 2018 NYT Apr 11, 2018 CNN Apr 9, 2018 RCP Apr 18, 2018 Arizona R + 5 Jeff Flake ( R ) ( Retiring ) 49 % R 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 Connecticut D + 6 Chris Murphy ( D ) 55 % D Safe D Safe D Safe D Safe D Safe D Safe D Delaware D + 6 Tom Carper ( D ) 66 % D Safe D Safe D Safe D Safe D Safe D Safe D Florida R + 2 Bill Nelson ( D ) 55 % D Tossup Tossup Tossup Lean D Tossup Tossup Hawaii D + 18 Mazie Hirono ( D ) 63 % D Safe D Safe D Safe D Safe D Safe D Safe D Indiana R + 9 Joe Donnelly ( D ) 50 % D 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 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 Massachusetts D + 12 Elizabeth Warren ( D ) 54 % D Safe D Safe D Safe D Safe D Safe D Safe D Michigan D + 1 Debbie Stabenow ( D ) 59 % D Likely D Safe 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 Minnesota ( Special ) D + 1 Tina Smith ( D ) 53 % D Lean D Likely D Likely D Likely 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 Mississippi ( Special ) R + 9 Cindy Hyde - Smith ( R ) 60 % R Likely R Safe R Likely R Likely R Safe R Likely R Missouri R + 9 Claire McCaskill ( D ) 55 % D Tossup Tossup Tossup Tossup Tossup Tossup Montana R + 11 Jon Tester ( D ) 49 % D Likely D Tilt D Lean D Lean D Lean D Lean D Nebraska R + 14 Deb Fischer ( R ) 56 % R Likely R Safe R Safe R Safe R Safe R Safe R Nevada D + 1 Dean Heller ( R ) 46 % R Tossup Tossup Tossup Tossup Tossup Tossup New Jersey D + 7 Bob Menendez ( D ) 59 % D Likely D Safe D Likely D Likely D Safe D Likely D New Mexico D + 3 Martin Heinrich ( D ) 51 % D Safe D Safe D Safe D Safe D Safe D Safe D New York D + 11 Kirsten Gillibrand ( D ) 72 % D Safe D Safe D Safe D Safe D Safe D Safe D North Dakota R + 16 Heidi Heitkamp ( D ) 50 % D Tossup Tossup Tossup Tossup Tossup Tossup Ohio R + 3 Sherrod Brown ( D ) 51 % D Lean D Lean D Lean D Lean D Lean D Lean D Pennsylvania EVEN Bob Casey Jr. ( D ) 54 % D Likely D Lean 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 Tennessee R + 14 Bob Corker ( R ) ( Retiring ) 65 % R Tossup Likely R Likely R Lean R Lean R Tossup Texas R + 8 Ted Cruz ( R ) 57 % R Likely R Safe R Likely R Likely R Likely R Lean R Utah R + 20 Orrin Hatch ( R ) ( Retiring ) 65 % R Safe R Safe R Safe R Safe R Safe 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 Virginia D + 1 Tim Kaine ( D ) 53 % D Safe D Safe D Safe D Safe D Likely D Likely D Washington D + 7 Maria Cantwell ( D ) 61 % D Safe D Safe D Safe D Safe D Safe D Safe D West Virginia R + 20 Joe Manchin ( D ) 61 % D Tossup Tossup Lean D Tossup Tossup Tossup Wisconsin EVEN Tammy Baldwin ( D ) 51 % D Likely D Tilt D Lean D Lean D Lean D Likely D Wyoming R + 25 John Barrasso ( R ) 76 % R Safe R Safe R Safe R Safe R Safe R Safe R 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. 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 ) Special election scheduled for November 6, 2018. August 14, 2018 primary election. Interim appointee running. Bob Anderson ( Republican ) Karin Housley ( Republican ) Nick Leonard ( Democratic ) Tina Smith ( Democratic ) Mississippi ( Class 2 ) Cindy Hyde - Smith Republican 2018 ( Appointed ) Special election scheduled for November 6, 2018. If no candidate receives a majority, a runoff will be held on November 27, 2018. Interim appointee running. Mike Espy ( Democratic ) Cindy Hyde - Smith ( Republican ) Chris McDaniel ( Republican ) Jason Shelton ( Democratic ) 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. August 28, 2018 primary election. New senator to be elected. Deedra Abboud ( Democratic ) Eve Reyes Aguirre ( Green ) Joe Arpaio ( Republican ) Bob Bishop ( Democratic ) Craig Brittain ( Republican ) Christian `` C.J. '' Diegel ( Republican ) Michelle Griffin ( Republican ) Doug Marks ( Libertarian ) Martha McSally ( Republican ) Chris Russell ( Democratic ) Richard Sherzan ( Democratic ) Kyrsten Sinema ( Democratic ) Nicolas Tutora ( Republican ) Kelli Ward ( Republican ) California Dianne Feinstein Democratic 1992 ( Special ) 1994 2000 2006 2012 Incumbent running. June 5, 2018 primary election. Arun Bhumitra ( Republican ) James Bradley ( Republican ) Jack Crew ( Republican ) Erin Cruz ( Republican ) Rocky De La Fuente ( Republican ) Kevin de León ( Democratic ) Adrienne Edwards ( Democratic ) Dianne Feinstein ( Democratic ) Colleen Fernald ( No party preference ) Rash Ghosh ( No party preference ) Tim Gildersleeve ( No party preference ) Michael Girgis ( No party preference ) Don Grundmann ( No party preference ) Jason Hanania ( No party preference ) Pat Harris ( Democratic ) Alison Hartson ( Democratic ) David Hildebrand ( Democratic ) Jerry Laws ( Republican ) Patrick Little ( Republican ) David Moore ( No party preference ) Kevin Mottus ( Republican ) Mario Nabliba ( Republican ) Lee Olson ( No party preference ) Tom Palzer ( Republican ) John Parker ( Peace and Freedom ) Herbert Peters ( Democratic ) Douglas Pierce ( Democratic ) Gerald Plummer ( Democratic ) Derrick Reid ( Libertarian ) Ling Ling Shi ( No party preference ) Paul Taylor ( Republican ) Donnie Turner ( Democratic ) Connecticut Chris Murphy Democratic 2012 Incumbent running. August 14, 2018 primary election. Ann - Marie Adams ( Democratic ) Matthew Corey ( Republican ) Chris Murphy ( Democratic ) Dominic Rapini ( Republican ) Delaware Tom Carper Democratic 2000 2006 2012 Incumbent running. September 11, 2018 primary election. Chuck Boyce ( Republican ) Tom Carper ( Democratic ) Kerri Evelyn Harris ( Democratic ) Florida Bill Nelson Democratic 2000 2006 2012 Incumbent running. August 28, 2018 primary election. Lateresa Ann Jones ( Republican ) Edward Janowski ( No Party Affiliation ) Howard Knepper ( Republican ) Tamika Lyles ( Democratic ) Scott McCatty ( Independent, write - in ) Martin Mikhail ( Republican ) Bill Nelson ( Democratic ) Rick Scott ( Republican ) Joe Smith ( Republican ) Marcia Roberta Thorne ( Republican ) Angie Walls - Windhauser ( Republican, write - in ) Joe Wendt ( Libertarian ) Randy White ( Democratic ) Hawaii Mazie Hirono Democratic 2012 Incumbent running. August 11, 2018 primary election. Mazie Hirono ( Democratic ) Thomas Edward White ( Republican ) Indiana Joe Donnelly Democratic 2012 Incumbent running. May 8, 2018 primary election. Mike Braun ( Republican ) Joe Donnelly ( Democratic ) James Johnson ( Independent ) Luke Messer ( Republican ) Todd Rokita ( Republican ) Maine Angus King Independent 2012 Incumbent running. June 12, 2018 primary election. Eric Brakey ( Republican ) Angus King ( Independent ) Max Linn ( Republican ) Zak Ringelstein ( Democratic ) Maryland Ben Cardin Democratic 2006 2012 Incumbent running. June 26, 2018 primary election. Tony Campbell ( Republican ) Ben Cardin ( Democratic ) Chris Chaffee ( Republican ) Evan Cronhardt ( Republican ) Nnabu Eze ( Republican ) John Graziani ( Republican ) Christina Grigorian ( Republican ) Albert Howard ( Republican ) Erik Jetmir ( Democratic ) Bill Krehnbrink ( Republican ) Chelsea Manning ( Democratic ) Marcia Morgan ( Democratic ) Jerry Segal ( Democratic ) Neal Simon ( Independent ) Edward Shlikas ( Independent ) Gerald Smith ( Republican ) Blaine Taylor ( Republican ) Brian Charles Vaeth ( Republican ) Rikki Vaughn ( Democratic ) Arvin Vohra ( Libertarian ) Rica Wilson ( Democratic ) Lih Young ( Democratic ) Massachusetts Elizabeth Warren Democratic 2012 Incumbent running. September 4, 2018 primary election. Shiva Ayyadurai ( Independent ) Geoff Diehl ( Republican ) James Devine ( Independent ) Joshua Ford ( Independent ) John Kingston ( Republican ) Beth Lindstrom ( Republican ) Darius Mitchell ( Republican ) Elizabeth Warren ( Democratic ) Allen Waters ( Republican ) Heidi Wellman ( Republican ) Michigan Debbie Stabenow Democratic 2000 2006 2012 Incumbent running. August 7, 2018 primary election. Bob Carr ( Republican ) John James ( Republican ) Sandy Pensler ( Republican ) Craig Allen Smith ( Democratic ) Marcia Squier ( Independent ) Debbie Stabenow ( Democratic ) Minnesota Amy Klobuchar Democratic 2006 2012 Incumbent running. August 14, 2018 primary election. Robert Bamheiser ( Republican ) Amy Klobuchar ( Democratic ) Jim Newberger ( Republican ) Paula Overby ( Green ) Jack Shepard ( Republican ) Mississippi Roger Wicker Republican 2007 ( Appointed ) 2008 ( Special ) 2012 Incumbent running. June 5, 2018 primary election. David Baria ( Democratic ) Danny Bedwell ( Libertarian ) Jensen Bohren ( Democratic ) Richard Boyanton ( Republican ) Jerone Garland ( Democratic ) Victor Maurice, Jr. ( Democratic ) Shawn O'Hara ( Reform ) Omeria Scott ( Democratic ) Howard Sherman ( Democratic ) Roger Wicker ( Republican ) Missouri Claire McCaskill Democratic 2006 2012 Incumbent running. August 7, 2018 primary election. Jerome Bauer ( Green ) Japheth Campbell ( Libertarian ) Jo Crain ( Green ) Angelica Earl ( Democratic ) David Faust ( Democratic ) Travis Gonzalez ( Democratic ) Brian Hagg ( Republican ) Josh Hawley ( Republican ) John Hogan ( Democratic ) Bradley Krembs ( Republican ) Claire McCaskill ( Democratic ) Tony Monetti ( Republican ) Kristi Nichols ( Republican ) Ken Patterson ( Republican ) Austin Petersen ( Republican ) Peter Pfeifer ( Republican ) Fred Ryman ( Republican ) Christina Smith ( Republican ) Courtland Sykes ( Republican ) Leonard Steinman ( Democratic ) Carla Wright ( Democratic ) Montana Jon Tester Democratic 2006 2012 Incumbent running. June 5, 2018 primary election. Timothy Adams ( Green ) Rick Breckenridge ( Libertarian ) Troy Downing ( Republican ) Steve Kelly ( Green ) Russell Fagg ( Republican ) Albert Olszewski ( Republican ) Matthew Rosendale ( Republican ) Jon Tester ( Democratic ) Nebraska Deb Fischer Republican 2012 Incumbent running. May 15, 2018 primary election. Deb Fischer ( Republican ) Jack Heidel ( Republican ) Chris Janicek ( Democratic ) Dennis Frank Macek ( Republican ) Larry Marvin ( Democratic ) Jane Raybould ( Democratic ) Jim Schultz ( Libertarian ) Jeffrey Lynn Stein ( Republican ) Frank Svoboda ( Democratic ) Todd Watson ( Republican ) Nevada Dean Heller Republican 2011 ( Appointed ) 2012 Incumbent running. June 12, 2018 primary election. Kamau Bakari ( Independent American ) Sherry Brooks ( Republican ) Danny Burleigh ( Democratic ) Sarah Gazala ( Republican ) Tim Hagan ( Libertarian ) Vic Harrell ( Republican ) Tom Heck ( Republican ) Dean Heller ( Republican ) David Knight ( Democratic ) Barry Michaels ( Independent ) Allen Rheinhart ( Democratic ) Jacky Rosen ( Democratic ) Jesse Sbaih ( Democratic ) New Jersey Bob Menendez Democratic 2006 ( Appointed ) 2006 2012 Incumbent running. June 5, 2018 primary election. Brian Goldberg ( Republican ) Bob Hugin ( Republican ) Lisa McCormick ( Democratic ) Bob Menendez ( Democratic ) New Mexico Martin Heinrich Democratic 2012 Incumbent running. June 5, 2018 primary election. Aubrey Dunn Jr. ( Libertarian ) Martin Heinrich ( Democratic ) Mick Rich ( Republican ) New York Kirsten Gillibrand Democratic 2009 ( Appointed ) 2010 ( Special ) 2012 Incumbent running. June 26, 2018 primary election. Chele Chiavacci Farley ( Republican ) Kirsten Gillibrand ( Democratic ) Scott Noren ( Democratic ) North Dakota Heidi Heitkamp Democratic 2012 Incumbent running. June 12, 2018 primary election. Kevin Cramer ( Republican ) Heidi Heitkamp ( Democratic ) Thomas O'Neill ( Republican ) Ohio Sherrod Brown Democratic 2006 2012 Incumbent running. May 8, 2018 primary election. Melissa Ackison ( Republican ) Sherrod Brown ( Democratic ) Don Elijah Eckhart ( Republican ) Philena Irene Farley ( Green, write - in ) Michael Gibbons ( Republican ) Dan Kiley ( Republican ) Timothy A. Pinion ( Republican, write - in ) Jim Renacci ( Republican ) Pennsylvania Bob Casey Jr. Democratic 2006 2012 Incumbent running. May 15, 2018 primary election. Lou Barletta ( Republican ) Bob Casey Jr. ( Democratic ) Jim Christiana ( Republican ) Joseph Vodvarka ( Republican ) Rhode Island Sheldon Whitehouse Democratic 2006 2012 Incumbent running. September 12, 2018 primary election. Robert Flanders ( Republican ) Robert Nardolillo ( Republican ) Sheldon Whitehouse ( Democratic ) Tennessee Bob Corker Republican 2006 2012 Incumbent retiring. New senator to be elected. August 2, 2018 primary election. David Anderson ( Republican ) Trudy Austin ( Independent ) Phil Bredesen ( Democratic ) Marsha Blackburn ( Republican ) John Carico ( Independent ) Larry Crim ( Republican ) Gary Davis ( Democratic ) `` Mr. Jim '' Elkins ( Republican ) Tommy Hay ( Republican ) Terri Honeycutt ( Republican ) Dean Hill ( Independent ) J. Darrell Lynn ( Republican ) Kevin McCants ( Independent ) Aaron Pettigrew ( Republican ) Breton Philips ( Independent ) Kris Todd ( Independent ) Rolando Toyos ( Republican ) John Wolfe ( Democratic ) Texas Ted Cruz Republican 2012 Incumbent running and renominated March 6, 2018. Carl Bible ( Independent ) Ted Cruz ( Republican ) Bob McNeil ( American Citizen Party ) Beto O'Rourke ( Democratic ) Utah Orrin Hatch Republican 1976 1982 1988 1994 2000 2006 2012 Incumbent retiring. June 26, 2018 primary election. New senator to be elected. Tim Aalders ( Constitution ) Craig Bowden ( Libertarian ) Loy Brunson ( Republican ) Alicia Colvin ( Republican ) Jeff Dranfield ( Democratic ) Jeremy Friedbaum ( Republican ) Stoney Fonua ( Republican ) Abe Jenkins ( Republican ) Torrey Jenkins ( Republican ) Tim Jimenez ( Republican ) Mike Kennedy ( Republican ) Abe Korb ( Independent, write - in ) Joshua Lee ( Republican ) Larry Livingston ( Democratic ) Reed McCandless ( Independent American ) Larry Meyers ( Republican ) Samuel Parker ( Republican ) Caleb Dan Reeve ( Independent, write - in ) Mitt Romney ( Republican ) Mitchell Vice ( Democratic ) Jenny Wilson ( Democratic ) Vermont Bernie Sanders Independent 2006 2012 Incumbent running. August 14, 2018 primary election. Folasade Adeluola ( Democratic ) Bernie Sanders ( Independent ) Jon Svitavsky ( Democratic ) Virginia Tim Kaine Democratic 2012 Incumbent running. June 12, 2018 primary election. Nicholas Freitas ( Republican ) E.W. Jackson ( Republican ) Tim Kaine ( Democratic ) Corey Stewart ( Republican ) Matt Waters ( Libertarian ) Washington Maria Cantwell Democratic 2000 2006 2012 Incumbent running. August 7, 2018 primary election. Maria Cantwell ( Democratic ) Jennifer `` GiGi '' Ferguson ( Democratic ) Clay Johnson ( Independent ) Mike Luke ( Libertarian ) Dave Strider ( Independent ) West Virginia Joe Manchin Democratic 2010 ( Special ) 2012 Incumbent running. May 8, 2018 primary election. Don Blankenship ( Republican ) Bo Copley ( Republican ) Evan Jenkins ( Republican ) Joe Manchin ( Democratic ) Patrick Morrisey ( Republican ) Jack Newbrough ( Republican ) Paula Jean Swearengin ( Democratic ) Tom Willis ( Republican ) Wisconsin Tammy Baldwin Democratic 2012 Incumbent running. August 14, 2018 primary election. Tammy Baldwin ( Democratic ) Kevin Nicholson ( Republican ) John Schiess ( Republican ) Leah Vukmir ( Republican ) Mary Jo Walters ( Independent ) Wyoming John Barrasso Republican 2007 ( Appointed ) 2008 ( Special ) 2012 Incumbent running. August 21, 2018 primary election. John Barrasso ( Republican ) Dave Dodson ( Independent ) Gary Trauner ( Democratic ) Arizona 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 will be 55 years old in 2018. He has declared he will retire at the end of his term. In 2016, Republican John McCain was re-elected to a sixth term in the Senate. However, Senator McCain has been diagnosed with an aggressive brain tumor. If Senator McCain 's seat becomes vacant, Arizona law requires that the vacancy be filled at the next general election. If this were to occur in 2018, then both Senate seats in Arizona would be up for election simultaneously. U.S. Representative Martha McSally, former state senator Kelli Ward, owner, co-founder of IsAnybodyDown ? Craig Brittain, Christian `` C.J. '' Diegel, pharmacist Nicolas Tutora, former Maricopa County Sheriff Joe Arpaio, and Michelle Griffin will contest the Republican primary. U.S. Rep. Kyrsten Sinema, Deedra Abboud, airshow pilot Bob Bishop, Chris Russell, and former Member of the Iowa House of Representatives Richard Sherzan are running for the Democratic nomination. Eve Reyes Aguirre is running as a Green Party Candidate. California 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 will be 85 years old in 2018. She is running for re-election. Democratic candidates aside from Feinstein include President pro tempore of the California State Senate Kevin de León, Community Advocate Adrienne Nicole Edwards, Eugene Patterson Harris, David Hildebrand, John `` Stuttering John '' Melendez, Douglas Howard Pierce, Alison Hartson, and 2016 candidate Steve Stokes. Republican candidates include Paul Allen Taylor, Gary Coson, Timothy Charles Kalemkarian, Erin Cruz, John Estrada, Donald R. Adams, Caren Lancona, and Stephen James Schrader. Derrick Michael Reid is running with the Libertarian Party. Independent candidates include biologist Tim Gildersleeve, Lee W. Olson, and evangelist Ling Ling Shi. Connecticut 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 will be 45 years old in 2018. He is running for re-election. He is being challenged for the Democratic nomination by Ann - Marie Adams. Businessmen Matthew Corey and Dominic Rapini are seeking 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 will be 71 years old in 2018. He announced he was running for re-election during an interview on MSNBC on July 24, 2017. Businessman Chuck Boyce is running for the Republican nomination. Florida 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. Nelson will be 76 years old in 2018. He will seek re-election to a fourth term in office. He is being challenged for the Democratic nomination by Tamika Lyles. Florida Governor Rick Scott has announced his candidacy for the Republican nomination. Scott will be 65 years old in 2018. 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. Lateresa Ann Jones, Howard Knepper, Joe Smith, and Marcia Roberta Thorne are also running for the Republican nomination. Edward Janowski is running as independents. Angie Walls - Windhauser is running as a Republican write - in candidate in the general election. Hawaii 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 will be 71 years old in 2018. Republican Thomas Edward White is running. Indiana 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 will be 63 years old in 2018. He is running. Congressmen Luke Messer and Todd Rokita and State Representative Mike Braun, are running for the Republican nomination. James Johnson is running as an independent. Maine 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 has indicated he will seek re-election. He will be 74 years old in 2018. State Senator Eric Brakey is running for the Republican nomination. Public school teacher and founder of UClass Zak Ringelstein is seeking the Democratic nomination. Homebuilder and 2012 U.S. Senate candidate Benjamin Pollard originally was running for the Democratic nomination but has since dropped out and will run as an independent. Maryland 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 will be 75 years old in 2018. He is running, He is being challenged in the Democratic primary by Chelsea Manning, Marcia Morgan, Jerry Segal, Richard `` Rikki '' Vaughn, Debbie `` Rica '' Wilson, and Lih Young. Tony Campbell, Evan Cronhardt, Nnabu Eze, Gerald Smith, and Blaine Taylor are seeking the Republican nomination. 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 will be 69 years old in 2018. She is running. State Representative Geoff Diehl, attorney and founder of Better for America, John Kingston, former Romney aide Beth Lindstrom, Darius Mitchell, Allen Waters, and Heidi Wellman are running for the Republican nomination. John Devine, Joshua Ford, and Shiva Ayyadurai are running as independents. Michigan 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. When she runs in 2018 she will be 68 years old. She is the only Democrat from the state of Michigan running for Senate. On the Republican side, businessman and historic preservationist Bob Carr, businessman John James, and businessman Sandy Pensler are running. Independent candidate Marcia Squier is also running. Marcia Squier ran as a Green Party candidate for District 14 of the U.S. House of Representatives in 2016. Minnesota 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 will be 58 years old in 2018. She is running. State Representative Jim Newberger, Robert Bahmheiser, and Physician Jack Shepard are running for the Republican nomination. Minnesota ( special ) 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. Mark Dayton, Governor of Minnesota, appointed Lt. Gov. Tina Smith on January 2, 2018, as an interim Senator until the November 2018 election. Democratic incumbent Tina Smith, Nick Leonard, Republican Karin Housley, and Republican Bob Anderson are running. Mississippi 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 will be 67 years old in 2018. He is running. Jensen Bohren, David Baria, and Howard Sherman are seeking the Democratic nomination. 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 Mayor of Tupelo Jason Shelton are running as Democratic candidates. Republican Chris McDaniel is also running. Missouri 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 will be 65 years old in 2018. She is running. She is being challenged in the Democratic primary by Angelica Earl. Attorney General Josh Hawley, Libertarian presidential candidate in 2016 Austin Petersen, assistant dean of aviation at University of Central Missouri Tony Monetti, and Courtland Sykes, are running for the Republican nomination. Japeth Campbell has declared his candidacy for the Libertarian nomination. Montana 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 will be 62 years old in 2018. He is running. State Auditor Matthew Rosendale, State Senator Albert Olszewski, former judge Russell Fagg, and Troy Downing are running for the Republican nomination. Green Party candidate Steve Kelly is running. Nebraska 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 will be 67 years old in 2018. She is running. Retired professor Jack Heidel is running for the Republican nomination. Todd Watson is running for the Republican nomination. Dennis Frank Macek is running for the Republican nomination. Larry Marvin, who was a candidate in 2008, 2012, and 2014, and Lincoln Councilwoman Jane Raybould are running for the Democratic nomination. Frank Svoboda is running for the Democratic nomination. Chris Janicek is running for the Democratic nomination. Jim Schultz is running for the Libertarian nomination. Nevada Main article : United States Senate election in Nevada, 2018 See also : List of United States Senators from Nevada One - term Republican 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 re-election. Representative Jacky Rosen and Jesse Sbaih are running for the Democratic nomination. New Jersey Main article : United States Senate election in New Jersey, 2018 See also : List of United States Senators from New Jersey Two - term Democrat 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. He is running. Democrats Lisa McCormick Republicans Brian D. Goldberg and Bob Hugin, are running. New Mexico 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 will be 47 years old in 2018. He is running. Mick Rich is seeking the Republican nomination. Aubrey Dunn Jr., New Mexico Commissioner of Public Lands and otherwise the first Libertarian to ever hold statewide elected office in history has announced his run for the seat. New York 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 will be 51 years old in 2018. She is running. Private equity executive Chele Chiavacci Farley has been nominated for U.S. Senate by the Republican and Conservative Parties. North Dakota 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 will be 63 years old in 2018. She is running. Congressman Kevin Cramer and former Niagara, North Dakota Mayor Thomas O'Neill are running for the Republican nomination. Ohio 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 will be 65 years old in 2018. He is running. U.S. Representative Jim Renacci, investment banker Michael Gibbons, businesswoman Melissa Ackison, Dan Kiley, and Don Elijah Eckhart are running for the Republican nomination. Pennsylvania 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 will be 58 years old in 2018. He is running. Republican candidates include U.S. Representative Lou Barletta, Jim Christiana, and Joseph Vodvarka. 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 will be 63 years old in 2018. He is running. State Representative Robert Nardolillo and former Rhode Island Supreme Court Associate Justice Robert Flanders are running for the Republican nomination. Tennessee 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. He will be 66 years old in 2018. 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. Republican U.S. Representative Marsha Blackburn, Memphis ophthalmologist Rolando Toyos and Larry Crim, a perennial candidate who ran as a Democrat in 2012 and 2014, and Aaron Pettigrew are running for the Republican nomination. Former Tennessee Governor Phil Bredesen is seeking the Democratic nomination. Texas 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 will be 48 years old in 2018. 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 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. 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. Hatch initially announced his re-election campaign on March 9, 2017, but later announced his plans to retire on January 2, 2018. 2012 Republican presidential candidate Mitt Romney is running for the seat. Attorney Larry Meyers is also running for the Republican nomination. 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 is also running for the Democratic nomination. Vermont 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 will be 77 years old in 2018. 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, he said that he would run for re-election. In 2016, activist and journalist Al Giordano stated his intention to challenge Sanders for the Democratic nomination to protest Sanders 's 2016 presidential campaign, which Giordano claims has divided the Democratic Party. In 2017, however, Giordano announced he would not run for the seat. Jon Svitavsky & Folasade Adeluola are running for the Democratic nomination. Virginia 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 will be 60 years old in 2018. He is running. State Delegate Nick Freitas, past Senate candidate and nominee for Lieutenant Governor in 2013 E.W. Jackson, and Prince William County Supervisor Corey Stewart are seeking the Republican nomination. Washington 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 will be 60 years old in 2018. She is running. Jennifer `` GiGi '' Ferguson is running. Clay Johnson and Dave Strider are running as independents. Mike Luke is running with the Libertarian Party. West Virginia 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. He will be 71 years old in 2018. Manchin is running for re-election. Environmental activist Paula Jean Swearengin, is running for the Democratic nomination. Representative Evan Jenkins, West Virginia Attorney General Patrick Morrisey, coal miner Bo Copley, Jack Newbrough, Don Blankenship, and Tom Willis are running for the Republican nomination. Wisconsin 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 will be 56 years old in 2018. She is running. Mary Jo Walters, a Democratic candidate for Lieutenant Governor in the 2014 primary, and later that year a write - in candidate for Governor is running as an independent. State Senator Leah Vukmir, businessman and member of Wisconsin Board of Veterans Affairs Kevin Nicholson and John Schiess are running for the Republican nomination. Wyoming 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 will be 66 years old in 2018. He is running. 58 year old Gary Trauner, a Jackson Hole businessman and US House candidate in 2006 and 2008, is running for the Democratic nomination. Businessman Dave Dodson is running as an independent. See also United States gubernatorial elections, 2018 Notes ^ Jump up to : Constitution Party and Socialist Equality Party do not have ballot access in California. Don Grundmann ( C - CA ) and David Moore ( SEP - CA ) appear on ballot as `` No party preference. '' Jump up ^ Mary Jo Walters ( D - WI ) is running as an independent. References 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 ^ Michael Wines ( October 14, 2017 ). `` Wary of Hackers, States Move to Upgrade Voting Systems ''. Nytimes.com. Retrieved October 17, 2017. 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 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 ^ Weida, Kaz ( August 21, 2017 ). `` Could Utah Turn Blue In 2018 ? This Senate Candidate Aims To Find Out ''. Rantt. Retrieved August 21, 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 ^ `` 2016 State PVI Changes -- Decision Desk HQ ''. decisiondeskhq.com. December 15, 2017. Jump up ^ `` 2018 Senate Race Ratings ''. Cook Political Report. January 5, 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. December 13, 2017. 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 to : Potter, Kyle ( December 13, 2017 ). `` Minnesota Governor Picks Lt. Governor Tina Smith to Replace Al Franken in the U.S. Senate ''. Time. Retrieved December 13, 2017. ^ Jump up to : Staff, MPR News. `` Replacing Franken : Who 's in, who 's out, who 's being talked about ''. Jump up ^ Orrick, Dave ( December 19, 2017 ). `` Washington County Republican Karin Housley wants Al Franken 's Senate seat ''. St. Paul Pioneer Press. Retrieved December 19, 2017. ^ Jump up to : Magan, Christopher ( February 5, 2018 ). `` Fellow Democrat Nick Leonard to challenge Tina Smith for Senate seat ''. St. Paul Pioneer Press. Retrieved February 6, 2018. ^ Jump up to : `` Mississippi agriculture official named to Senate ''. abcnews. Retrieved March 21, 2018. ^ Jump up to : `` Espy announces run for Cochran Senate seat ''. Clarion Ledger. Retrieved March 6, 2018. ^ Jump up to : CNN, Eric Bradner,. `` McDaniel switches Mississippi Senate races ''. Retrieved March 21, 2018. ^ Jump up to : `` Tupelo Mayor Jason Shelton announces run for U.S. Senate special election in Mississippi ''. Clarionledger.com. 2018 - 04 - 03. Retrieved 2018 - 04 - 04. ^ Jump up to : Jeff Flake ( October 24, 2017 ). `` Flake Announces Senate Future ''. United States Senator Jess Flake. Retrieved December 20, 2017. ^ Jump up to : Nowicki, Dan ( April 10, 2017 ). `` Democrat Deedra Abboud announces U.S. Senate bid ''. The Arizona Republic. Retrieved April 10, 2017. ^ Jump up to : `` Home ''. Eve for US Senate. ^ Jump up to : CNN, Eric Bradner. `` Joe Arpaio enters Arizona Senate race ''. ^ Jump up to : `` Airshow Pilot Bob Bishop Launches U.S. Senate Campaign ''. Aero - News Network. September 19, 2017. Retrieved November 14, 2017. ^ Jump up to : Roth, R ( September 25, 2017 ). `` Former `` Revenge Porn Website '' Mastermind Declares Run For Arizona Senate ``. Arizona Daily Independent. Retrieved October 7, 2017. ^ Jump up to : `` DIEGEL, CHRISTIAN - Candidate overview - FEC.gov ''. FEC.gov. Retrieved December 17, 2017. ^ Jump up to : `` GRIFFIN, MICHELLE MARIE DR PHD - Candidate overview - FEC.gov ''. FEC.gov. Jump up ^ `` MARKS, DOUG - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Hansen, Ronald ( November 7, 2017 ). `` Martha McSally tells House colleagues she is running for Senate ''. AZ Central. Retrieved November 14, 2017. ^ Jump up to : `` RUSSELL, DALE CHRISTOPHER - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Nowicki, Dan ( July 15, 2017 ). `` How much re-election trouble is Sen. Jeff Flake really in ? ''. The Arizona Republic. Retrieved July 21, 2017. ^ Jump up to : Hansen, Ronald ( September 28, 2017 ). `` Rep. Kyrsten Sinema enters Senate race, hoping to unseat Jeff Flake ''. Retrieved October 4, 2017. ^ Jump up to : `` TUTORA, NICHOLAS - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Min Kim, Seung ( October 27, 2016 ). `` Kelli Ward aims to oust Flake in 2018 ''. Politico. Retrieved November 10, 2016. ^ Jump up to : `` California Candidate List '' ( PDF ). California Secretary of State. Retrieved March 24, 2018. Jump up ^ `` Candidates for Public Office ''. Constitutionpartyofcalifornia.org. Retrieved 2018 - 04 - 04. Jump up ^ `` Socialist Equality Party announces California candidates in midterm elections ''. Wsws.org. 2018 - 04 - 03. Retrieved 2018 - 04 - 04. ^ Jump up to : Bass, Paul ( December 23, 2016 ). `` Murphy Navigates A Changed World ''. New Haven Independent. Retrieved December 29, 2016. ^ Jump up to : `` ADAMS, ANN MARIE DR - Candidate overview - FEC.gov ''. FEC.gov. ^ 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 : McGuiness, Dylan ( June 27, 2017 ). `` Branford Republican Announces Campaign for U.S. Senate ''. Hartford Courant. Retrieved July 13, 2017. ^ Jump up to : `` Kailani Koenig on Twitter ''. July 24, 2017. Retrieved July 24, 2017. ^ Jump up to : McAneny, DJ ( March 22, 2017 ). `` Republican candidate throws hat in the ring to target Sen. Tom Carper 's seat in 2018 ''. WDEL. Retrieved April 1, 2017. 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 : Dixon, Matt ; Caputo, Marc ( April 9, 2018 ). `` Scott running for Senate in epic showdown with Nelson, test of Trump 's popularity ''. Politico. ^ Jump up to : `` THORNE, MARCIA ROBERTA - Candidate overview - FEC.gov ''. FEC.gov. Jump up ^ WALLS - WINDHAUSER, ANGIE ^ Jump up to : Blair, Chad ( January 2, 2017 ). `` Warren Makes Pitch For Hirono ''. Honolulu Civil Beat. Retrieved February 23, 2017. ^ Jump up to : WHITE, THOMAS EDWARD ^ Jump up to : `` Candidate List - 2018 Primary Election '' ( PDF ). Indiana Secretary of State. February 12, 2018. Retrieved February 12, 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 : `` Senator King Responds to LePage 's Possible Senate Run in 2018 WABI TV5 ''. Retrieved November 22, 2016. ^ Jump up to : `` Maine Candidates Lists ''. Leuitenant Governor Election. Retrieved March 17, 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 : Hagan, Lisa ( January 6, 2017 ). `` Warren says she will run for reelection ''. The Hill. Retrieved January 7, 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 : O'Sullivan, Jim ( April 5, 2017 ). `` GOP 's Geoff Diehl sets stage to challenge Elizabeth Warren ''. The Boston Globe. Retrieved July 11, 2017. ^ Jump up to : `` DEVINE, JOHN P - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Gallerani, Katheryn ( March 17, 2017 ). `` Joshua Ford declares for U.S. Senate ''. Kingston Reporter. Retrieved August 22, 2017. ^ Jump up to : Dezenski, Lauren ( October 25, 2017 ). `` Kingston makes it official ''. Politico. Retrieved October 26, 2017. ^ Jump up to : O'Sullivan, Jim ( August 21, 2017 ). `` GOP 's Beth Lindstrom to launch challenge to Elizabeth Warren in 2018 ''. The Boston Globe. Retrieved August 21, 2017. ^ Jump up to : `` MITCHELL, DARIUS - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Phillips, Frank ( January 12, 2017 ). `` GOP Senate candidate readies for ' street fight ' ''. The Boston Globe. Retrieved April 25, 2017. ^ Jump up to : `` WELLMAN, HEIDI M - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Oosting, Jonathan ( February 11, 2017 ). `` Michigan Democrats promise ' fight ' at record convention ''. The Detroit News. Retrieved February 13, 2017. ^ Jump up to : `` Political Insider : Senate hopeful tried to sell Mets to Trump ''. Detroitnews.com. September 28, 2017. Retrieved December 20, 2017. ^ Jump up to : `` John James joins race to replace Sen. Debbie Stabenow ''. Detroit Free Press. September 21, 2017. Retrieved December 20, 2017. ^ Jump up to : `` Businessman Sandy Pensler announces U.S. Senate run ''. MLive.com. November 20, 2017. Retrieved December 20, 2017. Jump up ^ `` Democrats target the wrong Rep. Upton ''. Detroitnews.com. April 20, 2017. Retrieved August 25, 2017. ^ Jump up to : `` Mich. House OKs dead lawmaker 's bill in vote of unity ''. Detroitnews.com. May 18, 2017. Retrieved December 20, 2017. ^ Jump up to : Sherry, Allison ( December 25, 2016 ). `` Klobuchar will run again for Senate, rules herself out for governor 's race ''. Star Tribune. Retrieved December 26, 2016. ^ Jump up to : `` BARNHEISER, ROBERT BRUCE - Candidate overview - FEC.gov ''. FEC.gov. Retrieved December 21, 2017. ^ Jump up to : Stassen - Berger, Rachel ( August 5, 2017 ). `` Challenger emerges to run against U.S. Sen. Amy Klobuchar - GOP state Representative Jim Newberger ''. Pioneer Press. Retrieved August 10, 2017. Jump up ^ `` Transgender candidate announces U.S. Senate campaign in Minn.,... ''. Retrieved January 30, 2018. ^ Jump up to : `` President Trump Please Endorse Jack Shepard For The Gop Nomination For The U.S. Senate From The State Of Minnesota ''. Jackshepard.net. Retrieved December 20, 2017. Jump up ^ This state 's election has a primary run - off election under certain conditions. ^ Jump up to : `` 2018 Mississippi Candidate Qualifying List '' ( PDF ). Mississippi Secretary of State. Retrieved March 24, 2018. ^ 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 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 Jump up ^ PINION, TIMOTHY A. ^ 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 ''. FEC.gov. ^ Jump up to : `` NARDOLILLO, ROBERT ANTHONY III - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : `` Tennessee candidates Lists '' ( PDF ). Tennessee Secretary of State. Retrieved March 23, 2018. ^ Jump up to : `` BIBLE, CARL ALEXANDER - Candidate overview - FEC.gov ''. FEC.gov. Retrieved December 21, 2017. ^ 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 to : `` AmericanCitizenParty.us ''. americancitizenparty.us. 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 to : `` No, Sanders did NOT file for re-election as an independent in 2018 ''. Retrieved November 22, 2016. ^ Jump up to : Hirschfield, Peter ( July 6, 2017 ). `` Little - Known Challengers Seek To Unseat Bernie Sanders In 2018 ''. Vermont Public Radio. Retrieved July 7, 2017. ^ 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 ^ http://mattwaters.com/ ^ Jump up to : `` CANTWELL, MARIA - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : `` Search results - FEC.gov ''. FEC.gov. Jump up ^ `` Washington 2017 General Election ''. Thegreenpapers.com. Retrieved August 25, 2017. ^ Jump up to : `` Mike Luke for US Senate ''. www.luke4senate.com. ^ Jump up to : `` STRIDER, DAVID LEE - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : `` West Virginia Candidates Lists '' ( PDF ). West Virginia Secretary of State. Retrieved March 4, 2018. ^ Jump up to : `` U.S. Senate 2018 - Status of Incumbents -- Decision Desk HQ Election 2016 ''. www.decisiondeskhq.com. Retrieved January 12, 2017. ^ Jump up to : Glauber, Bill ( July 26, 2017 ). `` Marine veteran Kevin Nicholson launches GOP Senate Wisconsin bid against Tammy Baldwin ''. Milwaukee Journal Sentinel. Retrieved July 27, 2017. ^ Jump up to : `` SCHIESS, JOHN T - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : Glauber, Bill. `` Leah Vukmir enters Republican U.S. Senate race ''. Milwaukee Journal Sentinel. Retrieved September 7, 2017. Jump up ^ ( 1 ) Jump up ^ Who is In and Who is Out for 2018 ^ Jump up to : `` Mary Jo Walters is running for a U.S. Senate seat in Wisconsin ''. July 22, 2017. Retrieved August 15, 2017. ^ Jump up to : `` BARRASSO, JOHN A - Candidate overview - FEC.gov ''. FEC.gov. ^ Jump up to : `` Wealthy independent enters Wyoming US Senate race ''. Retrieved March 6, 2018. Jump up ^ `` Democrat Gary Trauner Announces Bid for Wyoming U.S. Senate ''. U.S. News & World Report. December 8, 2017. Retrieved December 8, 2017. Jump up ^ Caplan, David. `` Sen. John McCain diagnosed with brain tumor after blood clot removed '', ABC News ( July 19, 2017 ). Jump up ^ Arizona State Legislature. `` Vacancy in the office of United States senator or representative '', Arizona State Legislature ( January 14, 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 ^ `` LePage says comment about Senate run a joke ''. WMTW - TV. January 13, 2015. Retrieved June 22, 2015. Jump up ^ Shepherd, Michael ( April 3, 2017 ). `` GOP state senator Eric Brakey kicks off underdog 2018 bid to unseat Angus King ''. Bangor Daily News. Retrieved April 25, 2017. Jump up ^ `` Educator Ringlestein declares candidacy for U.S. Senate seat ''. WGME. October 6, 2017. Retrieved October 7, 2017. Jump up ^ `` Portland Democrat Benjamin Pollard to challenge Angus King for Senate seat ''. Portland Press Herald. December 21, 2017. Retrieved December 22, 2017. Jump up ^ `` Pollard quits Democrats, plans independent bid for U.S. Senate seat ''. Sun Journal. March 2, 2018. Retrieved March 7, 2018. Jump up ^ `` Michigan 's 14th Congressional District election, 2016 - Ballotpedia ''. Retrieved March 12, 2018. Jump up ^ `` CERTIFICATE OF APPOINTMENT OF UNITED STATES SENATOR FROM MINNESOTA '' ( PDF ). January 2, 2018. Retrieved February 23, 2018. Jump up ^ Domonoske, Camila ( December 13, 2017 ). `` Minnesota Lt. Gov. Tina Smith Will Replace Al Franken in U.S. Senate ''. NPR. Retrieved December 13, 2017. Jump up ^ Jacobs, Ben ( March 5, 2018 ). `` Mississippi Senator Thad Cochran announces he is stepping down ''. the Guardian. Retrieved March 5, 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 ''. 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 ^ 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 ^ Blomquist, Dan and Way, Robert. `` Bernie Sanders files for Democratic ballot in N.H. primary '', Boston Globe ( November 5, 2015 ) : `` When a reporter asked Sanders his party allegiance after he filed, Sanders responded, ' I 'm a Democrat. ' He then called on Buckley, the Democratic chairman, who confirmed the senator 's party allegiance. Sanders added that he would run as a Democrat in any future elections. '' Jump up ^ Joy - Ann Reid ( June 6, 2016 ). `` Meet Al Giordano, the Man Who Wants to Take Bernie Down ''. The Daily Beast. Retrieved June 20, 2016. Jump up ^ Noah Berlatsky ( June 9, 2016 ). `` Could this political gadfly steal Bernie Sanders ' Senate seat ? ''. The Week. Retrieved June 20, 2016. Jump up ^ Clauss, Kyle Scott ( June 8, 2016 ). `` Former Boston Phoenix Reporter Wants to Take Bernie Sanders ' Senate Seat ''. Boston Magazine. Retrieved June 16, 2016. Jump up ^ Giordano, Al ( April 18, 2017 ) `` @ algiordano : I have said many times I am not a candidate for office. I am fighting cancer. Please make room for someone else to run by not mentioning me. '' Twitter.com Jump up ^ `` Govt by You ''. www.herecomesjohnson.com. Jump up ^ `` 2014 Fall Partisan Primary '' ( PDF ). Wisconsin Elections Commissions. August 12, 2014. Jump up ^ `` Canvass Results for 2014 GENERAL ELECTION '' ( PDF ). Wisconsin Elections Commissions. November 4, 2014. Jump up ^ Cite error : The named reference WaltersI was invoked but never defined ( see the help page ). ( 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 Rhode Island South Carolina South Dakota Tennessee Texas 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 Oakland Phoenix San Francisco ( special ) San Jose Shreveport Washington, D.C. States and territories Alabama Alaska American Samoa Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Guam Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas U.S. Virgin Islands Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming United States Senate elections Multiple - date elections 1788 / 89 1790 / 91 1792 / 93 1794 / 95 1796 / 97 1798 / 99 1800 / 01 1802 / 03 1804 / 05 1806 / 07 1808 / 09 1810 / 11 1812 / 13 1814 / 15 1816 / 17 1818 / 19 1820 / 21 1822 / 23 1824 / 25 1826 / 27 1828 / 29 1830 / 31 1832 / 33 1834 / 35 1836 / 37 1838 / 39 1840 / 41 1842 / 43 1844 / 45 1846 / 47 1848 / 49 1850 / 51 1852 / 53 1854 / 55 1856 / 57 1858 / 59 1860 / 61 1862 / 63 1864 / 65 1866 / 67 1868 / 69 1870 / 71 1872 / 73 1874 / 75 1876 / 77 1878 / 79 1880 / 81 1882 / 83 1884 / 85 1886 / 87 1888 / 89 1890 / 91 1892 / 93 1894 / 95 1896 / 97 1898 / 99 1900 / 01 1902 / 03 1904 / 05 1906 / 07 1908 / 09 1910 / 11 1912 / 13 Single - date elections 1914 1916 1918 1920 1922 1924 1926 1928 1930 1932 1934 1936 1938 1940 1942 1944 1946 1948 1950 1952 1954 1956 1958 1960 1962 1964 1966 1968 1970 1972 1976 1978 1980 1982 1984 1986 1988 1994 1998 2000 2002 2006 2008 2012 2014 2016 2018 2020 2022 Special elections Election disputes Results by state List of elections in the United States House elections Presidential elections Gubernatorial elections Retrieved from `` https://en.wikipedia.org/w/index.php?title=United_States_Senate_elections,_2018&oldid=837114932 '' Categories : United States Senate elections, 2018 Hidden categories : Pages with reference errors Pages with broken reference names Use mdy dates from January 2018 Talk Contents About Wikipedia Deutsch Español Français עברית Nederlands Edit links This page was last edited on 18 April 2018, at 20 : 14. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: which republican senate seats are up in 2018
Answer: Arizona