Republican senators are preparing for possible primaries ahead of the 2026 midterm elections as they try to navigate the new political environment of the second Trump administration.
Defeating an incumbent senator in a primary is no easy task, but some on the right wing of the party have flirted with a defiant incumbent who voted to convict President-elect Trump in his 2021 impeachment trial, and more recently with President-elect Trump. has expressed disapproval of the impeachment trial. cabinet picks.
Here are five Republican senators who could face major challenges heading into 2026.
Joni Ernst
Sen. Joni Ernst (R-Iowa) is facing criticism from many Trump supporters for questioning Pete Hegseth, President Trump's pick to lead the Pentagon.
The senator is seen as a key swing vote for Hegseth. She is the first female veteran to serve in the Senate and has been a vocal advocate for tackling sexual misconduct in the military. Meanwhile, Hegseth has faced allegations of sexual misconduct, which he denies, and has said in the past that he wants to prevent women from serving in the military.
Iowa conservative media personality Steve Diese suggested this week. on social platform Meanwhile, Iowa Attorney General Brenna Byrd criticized “DC politicians.” Breitbart editorial Earlier this week, she asked the Senate to approve President Trump's Cabinet nominees. A spokeswoman for Mr. Byrd said the article was widely seen as a warning and pertained to the entire Senate.
This comment followed Ernst's first sober public feedback on Hegseth. She has since appeared to change her tune and offered her support for Pentagon candidates.
On Friday, Hegseth told Fox News that if a Republican senator votes against him, he shouldn't be selected for the primary.
Other Republican senators also expressed support for Ernst during this process.
“The approach is going to be 'everyone holds the line'. Everybody line up. We are the ones who brought you here. If you want to survive, you better stay healthy. Don't be on Santa's naughty list here, we'll make you a priority,” said Alaska State Sen. Lisa Murkowski (R). said in a recent discussion Sponsored by the centrist group No Labels.
“My friend Joni Ernst, who is probably one of the most conservative and principled Republican leaders in the Senate right now, is being hung out to dry for not being good enough.”
Ernst has also received praise from Republican allies for his work as founder and chairman of the Senate DOGE caucus, which honored President Trump's Department of Government Efficiency.
Thom Tillis
Senator Thom Tillis (RN.C.)launched his re-election campaign This week, he is expected to become one of the most vulnerable incumbents in the Senate this term.
He has expressed skepticism about President Trump's now-withdrawn attorney general nomination, former Rep. Matt Gaetz (R-Fla.), and defense secretary nominee Pete Hegseth, and has expressed skepticism about President Trump's now-withdrawn nominee for attorney general, former Rep. Matt Gaetz (R-Fla.), and Pete Hegseth, his nominee for secretary of defense. He is seen as another potential obstacle for Republicans to pursue Cabinet nominations.
Tillis also said he wasn't worried about the issue in the primaries, even if he rejected one or more of Trump's top-level nominees, although he said he was not worried about a type of pressure campaign surrounding the nominees. I admitted that it was.
North Carolina is expected to be one of the most competitive states in the 2026 Senate race, and any unrest on the right could make Tillis even more vulnerable.
“It's more important to address concerns behind closed doors and unite the Republican Party than to stir up controversy. I just think… it's a short-term win, but a long-term loss, if we're not careful.” '' Tillis told reporters. With footage from MSNBC.
Polls released this month A study by Victory Insights, a Florida-based firm, found that Lara Trump, the president-elect's daughter-in-law and a North Carolinian who just stepped down as co-chair of the Republican National Committee, wanted to “ruin” Tillis. “It's very likely.” In a hypothetical Republican primary.
However, Lara Trump has not expressed public interest in running for the position, and Trump's nominee for secretary, Sen. Marco Rubio (R-Florida), has decided to fill Florida's Senate vacancy. There is speculation that she could be selected to fill the Florida Senate vacancy, if available. Condition has been confirmed.
But the poll could suggest that a suitable primary challenger could pose a big problem for Tillis, who is seeking a third term in the Senate.
Mr. Tillis defeated his Democratic rival in 2020 by just two points, but Democrats have long sought to make inroads in key battleground states, losing narrowly in the past four cycles.
susan collins
Sen. Susan Collins (R-Maine) she said I plan to run for a sixth term. Although a rare Republican senator from a mostly blue state, the move could make her the longest-serving senator in Maine's history and undermine Democrats' chances to take back the Senate.
Democrats have long viewed Collins' seat as an opportunity to flip, but the centrist scored a decisive re-election victory over his rival across the aisle..
She has been willing to oppose the party in the past, as she did when she voted for it along with six other Republicans. Convict Trump on impeachment charges This has helped her appeal to independent and Democratic voters in the state, but has upset other Republicans.
Collins expressed concern about President Trump's nomination of Gaetz to head the Department of Justice, citing past statements by Robert F. Kennedy Jr., who is seeking to lead the Department of Health and Human Services (HHS). Some said they found it “alarming.”
So if Collins runs for re-election, it would give a boost to Republicans' efforts to hold on to their Senate seats, but whether she is so frustrated by her side that she faces a serious primary challenge remains to be seen. There's a problem.
And a Republican challenger could pose a challenge for Collins. Since winning the seat, she has I have never faced the first challenger. And despite winning re-election in 2014 by nearly 40 points, he won another term by a relatively narrow margin. 9 points As was the case for Democrats in 2020, he ran against former state House Speaker Sarah Gideon (D). energized by Collins voted to confirm Supreme Court Justice Brett Kavanaugh.
But she has brushed off the pressure on President Trump's nominees.
“For me, it's a daily thing, that's what it is,” Collins said recently. told the Washington Post. “I get attacked all the time, especially from the far left, and sometimes from the far right. So I'm used to that pressure.”
bill cassidy
Sen. Bill Cassidy (R-Louisiana) is one of only three Republicans remaining in the Senate next year to vote to convict Trump on the impeachment charge of inciting insurrection. Trump, a move that could come back to haunt Trump in 2026.
That has already made him a primary challenger. Louisiana Finance Secretary John Fleming entered the race earlier this month, objecting to Cassidy's 2021 guilty vote and support for Biden's bipartisan gun safety bill and bipartisan infrastructure bill. Raised. Fleming said Cassidy “has failed the people of Louisiana” and said the state needs a “true conservative voice” in the seat.
Although Cassidy has not officially announced it yet, he is signaling that he is getting ready And Fleming's early announcement shows Republicans are ready and willing to take on the two-term incumbent.
But Cassidy is a formidable incumbent. The senator's re-election campaign announced it raised $1.5 million in the third quarter of this year and ended the quarter with $5.8 million in the bank. Additionally, Cassidy has donated more than $2.2 million to Republican Senate candidates in the past cycle.
And despite voting to convict Trump four years ago, Cassidy supported the president-elect during this year's campaign. In an October post on X, Cassidy said he and Trump would “work together in the interests of our state and nation.”
cassidy, doctor chair coming in The chairman of the Health, Education, Labor, and Pensions Committee rejected claims that Kennedy, an HHS pick, had shared in the past that he favored vaccines and autism, but said he did not agree with Kennedy's “other policies. He said he was looking forward to “learning more” about his position.
John Cornyn
Sen. John Cornyn (R-Texas) plans to seek a fifth term in the Senate, but could face a formidable challenge from other Texas Republicans in the primary election. Meanwhile, Democrats are increasing their ambitions to flip Senate seats in red states.
Since the beginning of this year, speculation has swirled that Texas Attorney General Ken Paxton (R) may have said this. you may be able to bid Cornyn's seat could be a contentious primary between the state's MAGA factions and the Old Guard.
Mr. Cornyn was unsuccessful in his bid to become the next Senate Majority Leader. He promised to get Trump's nominee. But while fear of a primary challenge may still deter people from criticizing Trump's selection, it could give him more room to push back without leadership.
Meanwhile, Paxton has been embroiled in legal controversy, having been indicted on state securities fraud charges in 2015. Paxton wins reelection He lost by nearly 10 points in 2022, but was impeached by the Republican-controlled state House of Representatives in 2023 and suspended from office. The Texas Senate later voted to acquit him.
Meanwhile, Democrats are likely eyeing the seat, having made inroads in red Texas in recent cycles. Rep. Colin Allred (D-Texas) built notable momentum in November with his goal of unseating Sen. Ted Cruz (R-Texas), but ultimately fell short. Ta. Approximately 8 points.
But Cornyn has a history of fending off Republican primaries and Democratic challengers. In 2014, the senators defeated then-Rep. He lost by 40 points to Steve Stockman (R-Texas). Additionally, Cornyn defeated Democratic challenger MJ Hegar by nearly 10 points in 2020. Mr. Cornyn had the support of Mr. Trump.
Of the major possible threats, Cornyn said: He told Semaphore last month: “If you’re afraid of elections, you’re in the wrong field.”
