2026 United States Senate elections

The 2026 United States Senate elections are scheduled to be held on November 3, 2026, with 33 of the 100 seats in the Senate being contested in regular elections. In these elections, voters will elect candidates to six-year terms that begin on January 3, 2027, and expire on January 3, 2033.

Senators are divided into three classes whose terms are staggered, so that a different class is elected every two years. Class 2 senators were last elected in 2020 and are up for election in 2026. With the election of John Thune as leader of the Republican Conference, this will be the first election year since 2006 in which Senate Republicans are not led by Mitch McConnell.

Special elections have been scheduled in Ohio and Florida, following the resignation of JD Vance to become Vice President and Marco Rubio's resignation to become United States Secretary of State.

All 33 Class 2 Senate seats and two Class 3 seats are up for election in 2026. Class 2 currently consists of 20 Republicans and 13 Democrats. Democrats are defending two seats in states won by Donald Trump in 2024, in both cases by less than 3 percentage points: Michigan, where incumbent Gary Peters is not running for reelection; and Georgia, where the incumbent is Jon Ossoff. Michigan elected Democrat Elissa Slotkin to the Senate in 2024 by 0.3 percentage points. Georgia did not have a Senate election in 2024, although in the most recent Senate election, in 2022, Democrat Raphael Warnock won by three points in a runoff.

Five incumbent Democratic senators represent states won by Kamala Harris by single-digit margins in 2024: New Hampshire's Jeanne Shaheen, Minnesota's Tina Smith, Virginia's Mark Warner, New Jersey's Cory Booker, and New Mexico's Ben Ray Luján. Shaheen and Smith are not running for reelection. Susan Collins's seat in Maine is the only seat being defended by a Republican in a state that Kamala Harris won in 2024. Republican Thom Tillis of North Carolina is retiring from the Senate in a state Trump won by a single-digit margin in 2024.

The 2026 Senate map is considered favorable to Republicans. Democrats are defending 13 seats, while Republicans are defending 22, a distribution that advantages the GOP in maintaining its majority. Most rating groups identify two Republican-held seats as highly competitive and two others as somewhat competitive. By contrast, Democrats must flip at least four seats to win a majority while defending two highly vulnerable seats and two others viewed as somewhat vulnerable.

Each block represents one of the one hundred seats in the U.S. Senate. "D#" is a Democratic senator, "I#" is an Independent senator, and "R#" is a Republican senator. They are arranged so that the parties are separated and a majority is clear by crossing the middle.

Each block indicates an incumbent senator's actions going into the election.

As of March 2026, eleven senators—four Democrats and seven Republicans—have announced they will not seek reelection or are unable to seek re-election due to state laws. This is the most in a single election cycle, surpassing 2012, when ten senators did not run again.

Multiple sites and political pundits have published predictions of competitive seats. These predictions have considered factors such as the strength of the incumbent (if the incumbent was running for reelection) and the other candidates, and the state's partisan lean, reflected in part by the state's Cook Partisan Voting Index rating. The predictions typically assign ratings to each seat, indicating the predicted advantage that a party had in winning that seat. Most election predictors use:

• "tossup": no advantage
• "tilt" (used by some predictors): advantage that is not quite as strong as "lean"
• "lean": slight advantage
• "likely": significant, but surmountable, advantage
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These are seats that polling and predictions currently have listed as at least somewhat close.

Maine is the only one of the four Senate races expected to be the most competitive that has a Republican incumbent (Susan Collins). Maine's 2026 race is regarded as competitive due to the state's blue lean, but Collins previously kept her seat during cycles favorable to Democrats nationally (2008 and 2020). Incumbent governor Janet Mills, former deputy secretary of the Maryland Department of the Environment David Costello, and military veteran Graham Platner are running for the Democratic nomination in Maine. North Carolina's race is also considered competitive, since the state has a slight right lean, and incumbent Thom Tillis is retiring, having never won a majority of votes in his races. In July 2025, former Governor Roy Cooper announced his candidacy for the open seat. The same month, former RNC Chairman Michael Whatley entered the race after Tillis declined to seek reelection and was immediately endorsed by President Donald Trump. Cooper won the Democratic nomination in 2026.

Incumbents in Ohio (Jon Husted), Texas (John Cornyn), Alaska (Dan Sullivan), and Louisiana (Bill Cassidy) are also expected to have somewhat competitive races. Cornyn is facing a primary challenge from Texas Attorney General Ken Paxton. Cassidy is also facing primary challenges from Louisiana State Treasurer John Fleming and U.S. representative Julia Letlow; an incumbent U.S. senator has not lost a primary election in any state since 2012 in Indiana. Former United States senator Sherrod Brown, who lost reelection in 2024, has declared his candidacy in Ohio, while former representative Mary Peltola has also declared her candidacy in Alaska. Joni Ernst, the incumbent in Iowa, has announced that she will not seek a third term.

The incumbent in Nebraska, Pete Ricketts, could also face a competitive race against independent Dan Osborn, who ran against Republican Deb Fischer in the Class I race in 2024. Osborn was the most successful challenger of a Republican-held seat during the 2024 election cycle, losing by only 6 points, compared to Kamala Harris's loss by 20 points in Nebraska in the concurrent presidential election. Democrats did not contest the Class I seat in 2024 and are not expected to do so in 2026. In August 2025, the Nebraska Democratic Party endorsed Osborn. Several other candidates have filed for the Democratic primary, raising concern that their campaigns could split the vote and weaken Osborn's support in the general election.

The other half of the Senate races expected to be the most competitive are those in Georgia and Michigan. Georgia's incumbent Democratic senator (Jon Ossoff) is expected to be in a highly competitive race, though not as competitive as it could have been, since Republican Governor Brian Kemp declined to run for the seat. Ossoff narrowly beat former Senator David Perdue in a 2021 runoff to win his first term. In Michigan, senator Gary Peters has announced his retirement, setting a scramble for the state with an even PVI score.

The seats in Minnesota (vacated by Tina Smith), and New Hampshire (vacated by Jeanne Shaheen) are expected to be only marginally close races—especially New Hampshire, with popular former Republican governor Chris Sununu declining to run. Sununu's brother, former Senator John E. Sununu, announced a run for the Senate seat he lost to Shaheen in 2008. Former United States Senator from Massachusetts and U.S. Ambassador to New Zealand and Samoa Scott Brown has announced his candidacy. Brown was the Republican nominee in 2014, narrowly losing the general election to Shaheen.

Special U.S. Senate elections in Florida and Ohio are scheduled for November 3, 2026. Florida voters will elect a candidate to serve the remaining two years of former Senator Marco Rubio's unexpired term; Rubio resigned his seat in 2025 to become United States Secretary of State. Ohio voters will elect a candidate to serve the remaining two years of former Senator JD Vance's unexpired term; Vance resigned in 2025 to become Vice President of the United States.

Elections are sorted by date then state.

In these general elections, the winners will be elected for the term beginning January 3, 2027.

One-term Republican Tommy Tuberville previously said he planned to seek reelection, but announced on May 27, 2025, that he would instead run for governor of Alabama in 2026. He was elected to the U.S. Senate in 2020 with 60.1% of the vote.

Former Navy nuclear submarine captain Seth Burton, cardiac surgeon Dale Shelton Deas Jr., former Navy SEAL Jared Hudson, state Attorney General Steve Marshall, Congressman Barry Moore, and fuel company CEO Rodney Walker have announced their candidacies for the Republican nomination.

On the Democratic side, small business owners Dakarai Larriett and Kyle Sweetser, attorney Everett Wess, and chemist Mark Wheeler II have all launched campaigns. Sweetser, a former Republican, spoke at the 2024 Democratic National Convention.

Two-term Republican Dan Sullivan was reelected in 2020 with 53.9% of the vote. He is running for reelection to a third term.

Despite initially filing paperwork to run for her former House seat, former Democratic Congresswoman Mary Peltola announced her candidacy for the Senate in January 2026. Other Democrats seeking the nomination include Ann Diener, a sales executive at the Fairbanks Daily News-Miner, and nonprofit organizer William Lee Hunt.

Tom Cotton

Hallie Shoffner

Party

Republican

Democratic | | | | Tom Cotton | Hallie Shoffner | | Republican | Democratic | | | | | | | | | | | | Tom Cotton | Hallie Shoffner | | | | | | | | | Republican | Democratic | | | | | | | | | Incumbent U.S. senator Tom Cotton Republican | Incumbent U.S. senator Tom Cotton Republican | | | | | | | | | Incumbent U.S. senator Tom Cotton Republican | | | | | | | | |

Two-term Republican Tom Cotton was reelected in 2020 with 66.5% of the vote. Cotton is running for reelection, having secured the Republican nomination on March 3, 2026.

Rice farmer Hallie Shoffner secured the Democratic nomination on the same day.

One-term Democrat John Hickenlooper, elected with 53.5% of the vote in 2020, is running for reelection for a second term, and has said it will be his last term. Hickenlooper is being challenged by progressive state Senator Julie Gonzales in the Democratic primary.

Those running in the Republican primary include state senator Mark Baisley, business owner Amanda Calderon, former state representative Janak Joshi, AI strategic advisor George Markert, and Montrose County Commissioner Sean Pond.

Three-term Democrat Chris Coons was reelected in 2020 with 59.4% of the vote. He has filed paperwork to run for reelection. Former federal employee Christopher Beardsley is also running in the Democratic primary.

Former Democratic state Senator and Independent Party of Delaware nominee for U.S. Senate in 2024 Michael Katz and U.S. Army War College instructor John Shulli are running in the Republican primary.

Three-term Republican Marco Rubio was reelected in 2022 with 57.68% of the vote. He resigned on January 20, 2025, following his confirmation as U.S. Secretary of State. Governor Ron DeSantis announced he would appoint Florida Attorney General Ashley Moody as interim senator until a 2026 special election, and Moody has since declared her candidacy to serve the remainder of Rubio's term. Podcaster and January 6 U.S. Capitol attack rioter Jake Lang is challenging Moody in the Republican primary.

Former U.S. Representative for Florida's 9th congressional district Alan Grayson, attorney Joey Atkins, business owner Alex Gould, state representative Angie Nixon and Alexander Vindman, former director for European affairs at the U.S. National Security Council, a whistleblower in the 2019 Trump–Ukraine scandal, and the twin brother of Virginia Congressman Eugene Vindman, are running for the Democratic nomination.

One-term Democrat Jon Ossoff is running for a second term. He was narrowly elected in a 2021 runoff with 50.6% of the vote. As the only person to submit the necessary number of signatures to appear on the primary ballot, Ossoff is the presumptive Democratic nominee.

For the Republicans, U.S. representatives Buddy Carter of Georgia's 1st congressional district and Mike Collins of Georgia's 10th congressional district have announced their candidacies, along with former University of Tennessee football coach Derek Dooley. Former U.S. Army Special Forces brigadier general and pastor Jonathan McColumn and businessman John F. Coyne III are also running in the Republican primary.

Term-limited Governor Brian Kemp, former U.S. Representative Marjorie Taylor Greene, and Lieutenant Governor Burt Jones were all considered potential candidates, but declined to run.

Three-term Republican Jim Risch was reelected in 2020 with 62.6% of the vote and is running for a fourth term. He is being challenged for the Republican nomination by data engineer and Libertarian 2020 nominee for Idaho's 1st congressional district Joe Evans, entrepreneur Denny LaVe, and engineer Josh Roy.

The Democratic nomination is being sought by Nickolas Bonds, Brad Moore, and David Roth, a realtor and the 2022 U.S. Senate nominee.

Matt Loesby, the nominee for Idaho's 1st congressional district in 2024, is running as a Libertarian. Former Democratic state representative Todd Achilles and software developer Natalie Fleming are running as independents.

Juliana Stratton

Don Tracy

Party

Democratic

Republican | | | | Juliana Stratton | Don Tracy | | Democratic | Republican | | | | | | | | | | | | Juliana Stratton | Don Tracy | | | | | | | | | Democratic | Republican | | | | | | | | | Incumbent U.S. senator Dick Durbin Democratic | Incumbent U.S. senator Dick Durbin Democratic | | | | | | | | | Incumbent U.S. senator Dick Durbin Democratic | | | | | | | | |

Five-term Democrat and Senate Democratic Whip Dick Durbin was reelected in 2020 with 54.9% of the vote. On April 23, 2025, he announced he would not run for reelection.

On March 17, 2026, incumbent Lieutenant Governor Juliana Stratton won the Democratic primary, defeating a crowded field, including U.S. Representatives Raja Krishnamoorthi and Robin Kelly.

Former Illinois Republican Party chairman Don Tracy easily won the Republican primary the same day, beating attorney Jeannie Evans and Polish American Congress PAC national director Casey Chlebek.

Two-term Republican Joni Ernst was reelected in 2020 with 51.7% of the vote. On September 2, 2025, she announced that she would not seek reelection to a third term, after being criticised for comments regardings reductions in Medicaid.

Congresswoman Ashley Hinson and former state senator Jim Carlin are running for the Republican nomination.

Democratic candidates include state Senator Zach Wahls and state Representative Josh Turek. They cited Ernst's remarks about Medicare as a factor in their decisions to run.

One-term Republican Roger Marshall was elected in 2020 with 53.2% of the vote and is running for reelection.

Former Kansas state USDA Director Christy Davis, former federal prosecutor Jason Hart, commercial real estate developer Erik Murray, attorney Anne Parelkar, state senator Patrick Schmidt, art gallery owner Mike Soetaertare, former financial services executive Sandy Spidel Neumann, and counterintelligence specialist Noah Tyler are running for the Democratic nomination.

U.S. representative from Kansas's 3rd congressional district Sharice Davids has said she would consider a run if the state legislature adopts a new congressional map. Outgoing Democratic Governor Laura Kelly was considered a potential challenger to Marshall but has said she does not intend to run. Democratic State Senator Cindy Holscher publicly expressed interest in running, but on June 12, 2025, announced that she would run for governor of Kansas in 2026.

Seven-term Republican and former Senate Republican Leader Mitch McConnell was reelected in 2020 with 57.8% of the vote. McConnell retired as leader after the 2024 elections with plans to serve out the remainder of his term. On February 20, 2025, McConnell announced he will not seek reelection.

Hours after McConnell's announcement, former state Attorney General and 2023 Republican gubernatorial nominee Daniel Cameron announced that he was running to succeed McConnell. On April 22, Congressman Andy Barr of Kentucky's 6th congressional district announced his candidacy for the seat. On June 26, businessman Nate Morris declared he was entering the race.

For the Democrats, former state Representative Charles Booker, the 2022 Senate nominee and a former staffer for Governor Andy Beshear, and Marine fighter pilot Amy McGrath, the 2020 nominee, are both running again. Attorney and former United States Secret Service agent Logan Forsythe, state representative Pamela Stevenson, racehorse trainer Dale Romans, and former CIA officer Joel Willett have also announced their candidacies. There was some speculation that Beshear might enter the race, but he has said he does not intend to run, citing his desire to finish his second term as governor.

Two-term Republican Bill Cassidy was reelected in 2020 with 59.3% of the vote in the first round of the "Louisiana primary" and is running for reelection to a third term. The "Louisiana primary" has since been eliminated, and this election will use partisan primaries. Party primaries will be closed to members of other parties, though voters unaffiliated with a party may vote in either the Democratic or Republican primary.

U.S. Representative Julia Letlow and State Treasurer and former U.S. Representative John Fleming have both announced primary campaigns against Cassidy. President Donald Trump has endorsed Letlow.

Those running in the Democratic primary include nonprofit executive Nick Albares, data scientist and political consultant Gary Crockett, and farmer Jamie Davis.

Incumbent Republican Senator Susan Collins was reelected with 51% of the vote in 2020. She formally announced her reelection campaign in February 2026. As the only person to submit the necessary number of signatures to appear on the primary ballot, Collins is the presumptive Republican nominee.

In October 2025, term-limited Governor Janet Mills announced her candidacy and pledged to serve only one term if elected. Other Democratic candidates include former deputy secretary of the Maryland Department of the Environment David Costello and Sullivan harbor master and Marine veteran Graham Platner. Congressman Jared Golden was seen as a potential candidate but chose to retire from politics instead.

Independent Tim Rich, a hotelier, has announced his candidacy.

Two-term Democrat Ed Markey was reelected in 2020 with 66.2% of the vote, and is running for reelection to a third full term. The longest-serving Democrat in Congress, he will be 80 on Election Day. During the 2020 Democratic primary, Markey faced multiple calls to retire due to his age. He is being challenged in the Democratic primary by teacher and fantasy sports journalist Alex Rikleen and Congressman Seth Moulton. Congressman Jake Auchincloss considered a primary challenge to Markey, but later announced that he would not run.

2024 U.S. Senate nominee John Deaton is running for the Republican nomination. State representative Michael Soter was seen as a possible candidate, but in May 2025 the Boston Herald reported he was aiming for a statewide office rather than the U.S. Senate.

Two-term Democrat Gary Peters was narrowly reelected in 2020 with 49.9% of the vote. On January 28, 2025, he announced that he would not seek reelection.

State senator Mallory McMorrow, former Wayne County Health, Human, and Veterans Services Department Director Abdul El-Sayed, Congresswoman Haley Stevens of the 11th congressional district, and research health specialist Rachel Howard have announced their candidacies.

For the Republicans, Mike Rogers, former Congressman for the 8th congressional district and 2024 U.S. Senate nominee, has announced his candidacy. Other Republicans running include former co-chair of the Michigan Republican Party Bernadette Smith, educator Geneveive Peters Scott, engineer Fred Heuterbise, and dentist Kent Benham.

One-term Democrat Tina Smith was reelected in 2020 with 48.7% of the vote after being appointed by Governor Mark Dayton in 2018 following Al Franken's resignation and then winning a special election that year. On February 13, 2025, she announced she would not seek a second full term in 2026. Incumbent Lieutenant Governor Peggy Flanagan announced her candidacy the same day. Congresswoman Angie Craig announced her candidacy on April 29.

Republicans running include sportscaster Michele Tafoya, 2024 Republican U.S. Senate nominee and former professional basketball player Royce White, retired U.S. Navy officer Tom Weiler, and former Navy SEAL Adam Schwarze.

Cindy Hyde-Smith

Scott Colom

Party

Republican

Democratic | | | | Cindy Hyde-Smith | Scott Colom | | Republican | Democratic | | | | | | | | | | | | Cindy Hyde-Smith | Scott Colom | | | | | | | | | Republican | Democratic | | | | | | | | | Incumbent U.S. senator Cindy Hyde-Smith Republican | Incumbent U.S. senator Cindy Hyde-Smith Republican | | | | | | | | | Incumbent U.S. senator Cindy Hyde-Smith Republican | | | | | | | | |

One-term Republican Cindy Hyde-Smith was reelected in 2020 with 54.1% of the vote after being appointed in 2018 and winning a special election later that year. She is running for a second full term in office. She defeated physician Sarah Adlakha in the Republican primary on March 10, 2026.

Lowndes County District Attorney Scott Colom defeated U.S. Marine Corps veteran Albert Littell, and Priscilla Williams-Till, a cousin of Emmett Till, in the Democratic primary on March 10, 2026.

Ty Pinkins, the Democratic nominee for Secretary of State in 2023 and for U.S. Senate in 2024, is running as an independent.

Two-term Republican Steve Daines was reelected in 2020 with 55% of the vote. On March 4, 2026, Daines announced he would not seek reelection. The same day, U.S. Attorney Kurt Alme announced his candidacy and immediately won Daines's endorsement.

Former state Representative Reilly Neill is running for the Democratic nomination. Former Democratic U.S. senator Jon Tester, who was defeated in 2024, has said he will not enter the race.

Seth Bodnar, the president of the University of Montana until January 2026, is running as an independent candidate.

Two-term Republican Ben Sasse resigned early in the 118th Congress to become president of the University of Florida. On January 12, 2023, Governor Jim Pillen appointed former governor Pete Ricketts as interim senator. Ricketts won the 2024 special election to complete Sasse's term, defeating college professor Preston Love Jr., and is now running for reelection to his first full term.

Former labor union leader Dan Osborn, who challenged Republican Deb Fischer for Nebraska’s Class I Senate seat, has announced an independent bid. The Nebraska Democratic Party has declined to recruit a Democratic challenger to Ricketts, and the party's chair has endorsed Osborn. Several other candidates have filed for the Democratic primary, raising concern that their campaigns could split the vote and weaken Osborn's support in the general election.

Three-term Democrat Jeanne Shaheen was reelected in 2020 with 56.6% of the vote. On March 12, 2025, Shaheen announced that she would not seek reelection to a fourth term.

Democratic Congressman Chris Pappas declared his candidacy on April 3, 2025, becoming the first major candidate to the enter the race. New Hampshire Democratic Party rules committee member Karishma Manzur and state representative Jared Sullivan have also announced campaigns.

On June 25, former U.S. Senator from Massachusetts and former U.S. Ambassador to New Zealand and Samoa Scott Brown entered the race; he won the 2014 Republican Senate primary but lost the general election to Shaheen. Former U.S. Senator John E. Sununu, who lost his seat to Shaheen in 2008, is also running. His brother, former Governor Chris Sununu, declined to run. State senator Dan Innis briefly entered the race in August 2025 before withdrawing in September and endorsing Sununu.

Two-term Democrat Cory Booker was reelected in 2020 with 57.2% of the vote and is running for reelection to a third full term. As the only person to submit the necessary number of signatures to appear on the primary ballot, Booker is the presumptive Democratic nominee.

Running for the Republican nomination are physician Robert Lebovics, who was the party’s nominee for New Jersey’s 37th state senate district in 2005 and 2011; Justin Murphy, a former Tabernacle committeeperson who ran for the U.S. Senate in 2024 and for New Jersey’s 3rd congressional district in 2008 and 2010; Richard Tabor, a New Jersey state trooper who ran for the state’s 20th assembly district in 2025; and Alex Zdan, a former News 12 reporter and U.S. Senate candidate in 2024.

One-term Democrat Ben Ray Luján was elected in 2020 with 51.7% of the vote. On April 23, 2025, Luján announced that he would seek a second term.

Christopher Heuvel, the only Republican who filed, was disqualified from the race for failing to meet the requirements to make the ballot. Former oil and gas operator Larry Marker collected the signatures needed to qualify for the nomination as a write-in.

Michael Whatley

Roy Cooper

Party

Republican

Democratic | | | | Michael Whatley | Roy Cooper | | Republican | Democratic | | | | | | | | | | | | Michael Whatley | Roy Cooper | | | | | | | | | Republican | Democratic | | | | | | | | | Incumbent U.S. senator Thom Tillis Republican | Incumbent U.S. senator Thom Tillis Republican | | | | | | | | | Incumbent U.S. senator Thom Tillis Republican | | | | | | | | |

Two-term Republican Thom Tillis was narrowly reelected in 2020 with 48.7% of the vote. On June 29, 2025, he announced that he would not seek reelection to a third term. Former Republican National Committee chair Michael Whatley is the Republican nominee, having won the primary on March 3, defeating Don Brown.

On June 10, 2023, the North Carolina Republican Party censured Tillis for his bipartisan support on gun control and same-sex marriage, and he was seen as vulnerable to a primary challenge. Brown announced a primary campaign against Tillis in March 2025. Lara Trump, former co-chair of the Republican National Committee and Wilmington native, was considered a potential candidate to challenge Tillis, but announced she would not run.

In June 2025, Tillis voted against President Donald Trump's signature One Big Beautiful Bill Act, leading Trump to announce that he was looking for a primary challenger to Tillis. The next day, Tillis withdrew his reelection bid. After Tillis's withdrawal, Trump endorsed Whatley, who announced his campaign on July 31.

On the Democratic side, former Congressman Wiley Nickel declared his candidacy in April 2025. Former Governor Roy Cooper announced his candidacy on July 28, 2025. The next day, Nickel dropped out and endorsed Cooper. Cooper won the nomination and is the Democratic nominee.

One-term Republican JD Vance was elected in 2022 with 53% of the vote. On January 10, 2025, he resigned from the Senate after being elected Vice President of the United States in 2024. On January 17, Governor Mike DeWine announced that then-Lieutenant Governor Jon Husted would replace Vance in the Senate. Husted is running to serve the remainder of Vance's term.

On the Democratic side, former U.S. Senator Sherrod Brown, who was unseated in 2024, is running, as is IT professional Ron Kincaid.

Former Libertarian National Committee chair William Redpath is running as a Libertarian. Ohio Libertarians disqualified healthcare consultant Jeffrey Kanter from the Libertarian primary after he submitted hundreds of invalid signatures with his candidate petition.

Incumbent Republican Markwayne Mullin won a special election in 2022 with 61.8% of the vote to complete the remainder of the term vacated by Jim Inhofe, who resigned on January 3, 2023, due to declining health and died in 2024.

Mullin initially announced plans to seek his first full term in office, but on March 5, 2026, President Trump announced his nomination of Mullin for Secretary of Homeland Security; the Senate confirmed Mullin on March 23. Governor Kevin Stitt appointed board member and former CEO of Williams Companies Alan Armstrong to replace Mullin in the Senate. Armstrong was sworn in on March 24 and is required to sign an oath stating that he will not run in the 2026 election.

Candidates in the Republican primary include former real estate broker William Sean Buckner, country singer Gary Ty England, U.S. Representative for Oklahoma's 1st congressional district Kevin Hern, 2024 Oklahoma's 4th congressional district candidate Nick Hankins, and paramedic Brian Ragain.

Candidates in the Democratic primary include attorney R. O. Joe Cassity Jr., nonprofit founder Troy Green, lawyer Jim Priest, nurse N'Kiyla "Jasmine" Thomas, and former Republican Oklahoma state senator Ervin Stone Yen.

Entering Wedge Media executive director Ron Meinhardt and pharmacist Curtis Stinnett are running as independents. Sevier White, candidate for Oklahoma's 4th congressional district in 2016, is running as a Libertarian.

Three-term Democrat Jeff Merkley was reelected in 2020 with 56.9% of the vote. On July 20, 2025, Merkley announced that he would run for reelection. He is being challenged in the Democratic primary by retired electrical engineer Paul D. Wells.

Running in the Republican primary are state Senator David Brock Smith, commercial real estate broker Brent Barker, retired civil engineer Deborah C. Brown, perennial candidate David Burch, businessman Russ McAlmond, rancher Douglas T. Muck Jr., former Linn County Republican Party chair Jo Rae Perkins, and Scoutmaster and security worker Tim Skelton.

Five-term Democrat Jack Reed was reelected in 2020 with 66.5% of the vote. He is running for reelection to a sixth term. He is being challenged in the Democratic primary by elder care worker Connor Burbridge.

Former Rhode Island Republican Party official Raymond McKay is running for the Republican nomination.

Four-term Republican Lindsey Graham was reelected in 2020 with 54.4% of the vote. He is running for reelection to a fifth term. Duncan councilmember Calvin Cowen, Project 2025 author Paul Dans, motivational speaker Thomas Dismukes, Horry County Republican Party Executive Committeeman Patrick Herrmann, appliance repair executive Mark Lynch, and hip-hop artist Darius L. Mitchell are challenging Graham in the Republican primary.

Those declared for the Democratic primary include pediatrician Annie Andrews, former senior vice president of institutional advancement at Paine College Brandon Brown, and logistics professional Kyle Freeman.

Motivational speaker Jason Brenkus and Chair of the South Carolina Libertarian Party State Committee Kasie Whitener are running in the Libertarian primary. House painter Mark Hackett is running as a member of the Constitution party.

Two-term Republican Mike Rounds, who was reelected in 2020 with 65.7% of the vote, is running for a third term. Navy veteran and businessman Justin McNeil is challenging Rounds in the Republican primary.

Businessman and former South Dakota state trooper Julian Beaudion is the presumptive Democratic nominee.

U.S. Navy and Air Force veteran, former Northern State University political science professor, and Democratic nominee for U.S. Senate in 2022 Brian Bengs has announced his candidacy as an independent.

One-term Republican Bill Hagerty was elected in 2020 with 62.2% of the vote and is running for reelection. Hagerty is the presumptive nominee, as no other Republican qualified for the primary ballot.

Running for the Democratic nomination are consultant Marquita Bradshaw, former Tennessee Democratic Party Director of Party Affairs Maria Brewer, teacher Civil Miller-Watkins, and professor Diana Onyejiaka.

TBD

James Talarico

Party

Republican

Democratic | | | | TBD | James Talarico | | Republican | Democratic | | | | | | | | | | | | TBD | James Talarico | | | | | | | | | Republican | Democratic | | | | | | | | | Incumbent U.S. senator John Cornyn Republican | Incumbent U.S. senator John Cornyn Republican | | | | | | | | | Incumbent U.S. senator John Cornyn Republican | | | | | | | | |

Four-term Republican John Cornyn was reelected in 2020 with 53.5% of the vote and is running for a fifth term in 2026.

Cornyn and state Attorney General Ken Paxton ran in the Republican primary on March 3. Since neither received more than 50% of the vote, they will face each other in a runoff election on May 26. Congressman for the 38th congressional district Wesley Hunt challenged both Paxton and Cornyn but lost the primary.

Texas state representative James Talarico is the Democratic nominee, defeating Jasmine Crockett, U.S. Representative for the 30th district, in the primary. Former U.S. Representative Colin Allred, who ran unsuccessfully for the Class I Senate seat in 2024, also initially announced a campaign, but later pivoted to a campaign for Texas's 33rd congressional district.

Three-term Democrat Mark Warner was reelected in 2020 with 56% of the vote and is running for reelection. As the only person to submit the necessary number of signatures to appear on the primary ballot, Warner is the presumptive Democratic nominee.

Seeking the Republican nomination are Certified Public Accountant Kim Farrington; retired United States Army Major general Bert Mizusawa, who ran for U.S. Senate in 2018 and for Virginia's 2nd congressional district in 2010; and U.S. Marine Corps Reserve Colonel David Williams. Attorney Chuck Smith has a pending lawsuit that may allow him to qualify for the primary ballot.

Former investment banker and reality television personality Mark Moran is running as an independent, after initially declaring for the Democratic primary.

Two-term Republican Shelley Moore Capito was reelected in 2020 with 70.3% of the vote and is running for reelection to a third term. Also running in the Republican primary are third-party logistics executive Alex Gaaserud, sales consultant Bryan McKinney, retail worker Janet McNulty, staff engineer David Purkey, and state senator Tom Willis from the 15th district.

On the Democratic side, the primary field includes former Morgantown City Councilwoman Rachel Fetty Anderson, attorney Thornton Cooper, former Lieutenant Governor and former President of the West Virginia Senate Jeff Kessler, cybersecurity technician Rio Phillips, and political organizer Zach Shrewsbury.

One-term Republican Cynthia Lummis was elected in 2020 with 72.8% of the vote and is not seeking reelection. Congresswoman Harriet Hageman and Wyoming Army National Guard veteran Jimmy Skovgard are running for the Republican nomination to succeed Lummis.

Former Democratic state Representative James W. Byrd has announced his candidacy.

• 2026 United States elections
• Opinion polling on the second Trump presidency