As 2025 draws to a close, the country is already turning its attention to next year’s midterm elections.
Republicans are facing favorable odds in the Senate, where they currently hold a 53–47 advantage.
To do so, they’ll need to fend off challenges from Democrats and make gains in a series of key races, including in Georgia, North Carolina, Maine, and Texas.
1. Texas
Both the Democratic and Republican primaries in the Lone Star State are intense contests.On the GOP side, Texas Attorney General Ken Paxton is running to replace incumbent Sen. John Cornyn (R-Texas).
Paxton entered the race earlier this year, carrying baggage from controversies, including a 2023 impeachment trial in which he was ultimately acquitted by the Texas Senate.
The race has been labeled by Paxton as a contest between his populist, “America First” politics and establishment politics, which he claims Cornyn represents.
Cornyn has described the race as a question of character, referencing Paxton’s impeachment, allegations of adultery, and other legal challenges faced by his challenger.
Most observers and prediction markets have pegged these two candidates as the front-runners.
However, Rep. Wesley Hunt (R-Texas) has also thrown his hat into the ring, setting up a three-way primary that is likely to result in a runoff.
President Donald Trump has not yet made an endorsement in the race.
Given the broader political environment, Democrats hope for a long-shot win. Texas state Rep. James Talarico is currently leading the pack of potential nominees.
Talarico rose to prominence during the redistricting battle this summer as Texas Republicans voted to add five Republican districts to the state’s congressional map.
His main rival for the nomination is Rep. Jasmine Crockett (D-Texas), whose Oct. 8 entry into the race prompted former Rep. Colin Allred (D-Texas) to end his bid.
The primary race will be held on March 3, and any runoff races are scheduled for May 26.
2. Georgia
For years, Republicans have sought to reclaim at least one of the Peach State’s two Senate seats, which were won by Sens. Raphael Warnock (D-Ga.) and Jon Ossoff (D-Ga.) in early January 2021 runoff elections.This year, Ossoff has no Democratic rivals to fend off in the primary, while Republicans show a crowded field in their bid to reverse their losing streak in the state’s Senate races.
The top declared challengers in the Republican primary include Rep. Mike Collins (R-Ga.), Rep. Buddy Carter (R-Ga.), and former football coach Derek Dooley.
Each has emphasized loyalty to Trump while vying for an endorsement from the White House, although the president has so far stayed out of the race.
Outgoing Georgia Gov. Brian Kemp, a Republican, has endorsed Dooley.
However, Ossoff leads in hypothetical matchups with any of the three Republicans in the general election.
Georgia’s primary is set for May 19, 2026, and the primary runoff date is June 16, 2026.
3. Maine
Farther up the Eastern Seaboard, a long-serving Republican could be facing her toughest political challenge yet.
First elected in 1996, Sen. Susan Collins (R-Maine) has bucked trends in New England, where all other federal office seats are held by Democrats.
Collins’s seat is a top target for Democrats. She was reelected in 2020 with 51 percent of the vote, fending off Democratic challenger Sara Gideon, who won 42.4 percent.
Two major Democratic contenders seeking the nomination in the Pine Tree State are military veteran and political newcomer Graham Platner and Maine Gov. Janet Mills.
At the start of the election cycle, Platner’s populist and progressive brand of politics garnered attention from left-leaning Democratic voters nationwide, earning him the endorsement of Sen. Bernie Sanders (I-Vt.).
However, his candidacy has faced difficulties following multiple scandals.
Mills’s candidacy has the backing of Senate Minority Leader Chuck Schumer (D-N.Y.).
Maine’s primary is scheduled for June 9, 2026.
4. Michigan
In Michigan, Republicans hope to capitalize on the retirement of incumbent Sen. Gary Peters (D-Mich.) to win a key pickup in a state that has become synonymous with battleground politics in recent years.Former Rep. Mike Rogers (R-Mich.) is the presumptive GOP nominee this year. Rogers was the Republicans’ nominee in the state’s 2024 Senate election, which he lost to Sen. Elissa Slotkin (D-Mich.) by just 0.3 percent.
Trump has endorsed Rogers in the race.
However, in a race that still favors Democrats, the Democratic field is more competitive. So far, Rep. Haley Stevens (D-Mich.), Michigan state Sen. Mallory McMorrow, and physician Abdul El-Sayed have thrown their hats in the ring.
McMorrow has said she would not support Schumer as Senate Democratic leader if she were elected. Establishment Democrats are supporting Stevens.
Michigan’s primary election is scheduled for Aug. 4, 2026.
5. Ohio
Once upon a time, the Buckeye State was the definitive swing state, serving as a top target for both parties. But in recent years, it has become nearly a lock for Republicans.In 2026, former Sen. Sherrod Brown (D-Ohio) hopes to change that and make a political comeback after losing his seat in the state’s 2024 Senate election.
Brown served in the Senate from 2007 to 2025, before losing to Sen. Bernie Moreno (R-Ohio) in the 2024 election.
The seat up for grabs is currently occupied by Sen. Jon Husted (R-Ohio), who was appointed by Gov. Mike DeWine to fill the seat after Vice President JD Vance assumed his current role.
The race this year is a special election, and the winner will serve out the remaining two years of Vance’s term.
Ohio’s primaries are set for May 5, 2026.
6. North Carolina
North Carolina has long been viewed as a swing state, despite its results typically favoring Republicans.In 2026, Republicans are seeking to hold the seat being vacated by Sen. Thom Tillis (R-N.C.), who is retiring.
Democrats’ chances in the race are bolstered by the decision of former Gov. Roy Cooper, a popular Democrat who has proven electable at a statewide level, to seek the post.
Republicans are expected to field Republican National Committee Chairman Michael Whatley, who has been endorsed by Trump.
The North Carolina primary will be held on March 3, 2026, and any runoffs are scheduled for May 12, 2026.
7. Nebraska
In Republican stronghold Nebraska, the Democrats do not plan to field a candidate.Sen. Pete Ricketts (R-Neb.), who was appointed by the governor to fill the vacancy left by the retirement of Sen. Ben Sasse (R-Neb.), is the odds-on favorite to win the seat.
However, Republicans could still face a battle to hold the seat in 2026 in the form of independent candidate Dan Osborn.
In 2024, Osborn, who would not caucus with either party, came within 6.67 percentage points of winning the seat.
Nebraska’s primary is set for May 12, 2026.
8. New Hampshire
Although New Hampshire favors Democrats on a national level, Republicans hope to defy trends in 2026 in the wake of the retirement of Sen. Jeanne Shaheen (D-N.H.).The Republican primary is a two-way race between former Sens. John E. Sununu (R-N.H.) and Scott Brown (R-Mass.).
Establishment Senate Republicans are supporting Sununu, who served in the Senate between 2003 and 2009.
On the Democratic side, Rep. Chris Pappas (D-N.H.) is the front-runner.
The primary election in New Hampshire is scheduled for Sept. 8, 2026.
