These 4 Democrat senators are the most likely to lose their seats in 2024

A top non-partisan political handicapper is forecasting that Democrats face a serious challenge holding on to four crucial Senate seats as they attempt to protect their razor-thin majority in the chamber in the 2024 elections.

The first Senate race ratings of the new cycle by Sabato’s Crystal Ball at the University of Virginia’s Center for Politics are the latest by a leading election handicapper to point to a rough road ahead for the Democrats.

Democrats flipped a GOP Senate seat in Pennsylvania in November’s midterm elections, and they currently hold a 51-49 majority in the chamber – which includes three independent senators who caucus with the Democratic conference.

But Republicans are energized by a very favorable Senate map in 2024, with Democrats defending 23 of the 34 seats up for grabs. Three of those seats are in red states former President Donald Trump easily carried over President Biden in 2020: Ohio, West Virginia and Montana. Five other Democratic seats are in key swing states narrowly carried by Biden in the 2020 presidential election: Arizona, Michigan, Nevada, Pennsylvania and Wisconsin. In Michigan, longtime Democratic Sen Debbie Stabenow announced she’ll retire after next year rather than seek re-election.

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Sen. Joe Manchin (D-WV) gestures as he speaks to reporters in the Hart Senate Office building on August 01, 2022, in Washington, DC.  (Photo by Anna Moneymaker/Getty Images)
(Anna Moneymaker/Getty Images)

According to Sabato’s Crystal Ball, three Democratic held seats are toss-ups while one is ranked as lean Republican.

“Democrats are playing much more defense than Republicans,” Kyle Kondik, Sabato’s Crystal Ball managing editor, highlighted. “Of the current Democratic seats, West Virginia starts as the clearest Republican takeover opportunity, with Arizona, Montana, and Ohio as Toss-ups.”

And Kondik notes that “the GOP has no Toss-up or Leans Republican seats to defend at the starting gate.”

Here are the four Democratic senators who face challenging re-elections.

Sen. Joe Manchin of West Virginia

Manchin, a former governor and moderate Democrat who hails from one-time Democratic leaning state that’s turned overwhelmingly red in recent cycles, has yet to announce if he’ll seek another term next year. Manchin won re-election in 2018 by three points in a state then-President Donald Trump carried by nearly 40 points two years later. Sabato’s Crystal Ball ranks this race as lean Republican.

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“It is fairly unusual for us to start an incumbent as an underdog, but we think it’s warranted in this instance,” Kondik emphasized. 

Sen. Jon Tester of Montana

Tester, a farmer, three-term senator, and the only Democrat to hold statewide office in the red state of Montana, has yet to say if he’ll run for re-election in 2024. 

Senator Jon Tester, a Democrat from Montana, speaks during a Senate Banking, Housing, and Urban Affairs Committee hearing in Washington, D.C., U.S., on Wednesday, June 22, 2022. 
(Ting Shen/Bloomberg via Getty Images)

Trump carried Montana by 16 points in 2020 and Sabato’s Crystal Ball ranks this race a toss-up.

Sen. Sherrod Brown of Ohio

Brown, who’s served nearly a half century as an elected state and federal office holder, has already said he’ll run next year for a fourth six-year term in the Senate.

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Ohio, which was once a premiere general election battleground state, has shifted red in recent cycles, and this race is also ranked a toss-up.

“Brown should be able to get at least some crossover support, but will that be enough to overcome a GOP margin of, say, 8 points for president (Trump’s margin in both 2016 and 2020)?” Kondik wrote.

Chairman Sherrod Brown, D-Ohio, questions nominee to be the Comptroller of the Currency Saule Omarova as she testifies before the Senate Banking, Housing and Urban Affairs Committee during a hearing on Capitol Hill in Washington, D.C., on Nov. 18, 2021. (Photo by JIM WATSON/AFP via Getty Images)
(JIM WATSON/AFP via Getty Images)

Republicans are already taking aim at all three senators. As Fox News first reported earlier this month, the National Republican Senatorial Committee (NRSC) launched a “retire or get fired” digital campaign targeting Manchin, Tester, and Brown, and tying them to President Biden.

Sen. Kyrsten Sinema of Arizona

Sinema, a moderate Democratic lawmaker, last month announced she was leaving the party and registering as an Independent. Sinema has yet to announce if she’ll seek another term in 2024.

Sen. Kyrsten Sinema, D-Ariz., speaks at a news conference after the Senate passed the Respect for Marriage Act at the Capitol Building on Nov. 29, 2022, in Washington, D.C.
(Anna Moneymaker/Getty Images`)

But she already faces a challenge from the left, as earlier this month progressive Rep. Ruben Gallego launched a bid for the Democratic Senate nomination in the key southwestern battleground.

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“The Arizona situation is fascinating, given the possibility of a true 3-way race,” Kondik highlighted.