Key Senate Races 2026: Who’s the Favorite to Win in the US?

We’re breaking down the odds on which party will take control of the US Senate in 2026. Which states will prove decisive, and which party will emerge as the majority leader?

On the eve of the 2026 midterm elections, the battle for control of the US Senate remains extremely tense. According to the trading platform Kalshi, the chances of victory for the Republican and Democratic parties are nearly equal: 51% versus 49%, respectively. Currently, Republicans hold 53 seats, while Democrats, together with two independent senators, have 47. To gain a majority, Democrats need to increase their representation by four seats. The spotlight is on five states where the outcome is hard to predict: Alaska, Iowa, Michigan, Ohio, and Texas. These races could prove decisive in determining the future political balance of the country. Alaska: Mary Peltola challenges Republican dominance Alaska is hosting one of the most unusual Senate campaigns of this cycle. Former Democratic Representative Mary Peltola, the first Alaska Native in Congress, has managed to turn a traditionally safe Republican seat into a hotly contested race. In 2022, she won the election to the House of Representatives, but in 2024 she lost by just 2.5 percentage points, despite Donald Trump winning the state by about 13%. This level of support from voters who back candidates from both parties explains why Kalshi traders see Peltola as a serious challenger to incumbent Republican Senator Dan Sullivan. Sullivan is an experienced politician, re-elected in 2020 with 54%. Democrats haven’t won a Senate race in Alaska since 2008, but Peltola’s personal popularity and her political identity, focused on state interests, make her a much stronger candidate than a typical Democrat. This year, The Cook Political Report moved the Alaska race into the “toss-up” category. Before the main campaign begins, the state will hold a “jungle primary” on August 18, where the top four candidates advance to the next round, and the winner is determined by ranked-choice voting. Adding to the intrigue, another Republican named Dan Sullivan will also appear on the ballot, which could cause confusion among voters. The Associated Press has covered this controversy about the candidate’s namesake. Iowa: An open seat in a state shifting right In Iowa, Republicans retain a slight advantage, but the race for the seat vacated by Senator Joni Ernst promises to be intense. Republican candidate Ashley Hinson is a sitting member of the House of Representatives, while Democrat Josh Turek is a state legislator and Paralympic champion. The state’s political dynamics favor Hinson: Iowa has leaned Republican for several cycles, and Ernst first won her seat in 2014. Hinson enters the race with name recognition and national party support. However, the absence of an incumbent senator opens a window of opportunity for Democrats. Turek won the primary with about 63% of the vote. According to an August poll by Emerson College, Hinson leads Turek by a narrow margin—48% to 45%, with 6% undecided. In the same poll, Democrat Rob Sand leads in the governor’s race, which could further boost Democratic turnout at all levels. The price of a Republican victory contract on Kalshi is 55%, reflecting a fragile balance: Iowa is no longer considered a classic “swing” state, but the lack of a clear favorite and a strong Democratic candidate prevent the race from being classified as safe for Republicans. Michigan: Democrats defend their position in a tough environment Michigan is the only one of the five key states where Democrats are defending their seat. After Senator Gary Peters stepped down, the race is between Democrat Abdul El-Sayed and Republican Mike Rogers. In 2024, Rogers nearly won another Michigan Senate seat, losing to Elissa Slotkin by less than half a percent, despite Trump’s victory in the state. This result strengthened Republicans’ confidence in his ability to run a successful statewide campaign. El-Sayed’s path to the nomination was different: the former Detroit health department director and representative of the party’s progressive wing narrowly defeated party establishment-backed Haley Stevens, even though his opponent significantly outspent him on the campaign (Associated Press data). Early data on the general election campaign is mixed. A Fox News poll shows Rogers ahead—51% to 47%. However, on Kalshi, Democrats and El-Sayed are rated higher—57%. This discrepancy is explained by traders’ greater trust in the overall political environment and Michigan’s Senate election history, rather than a single unfavorable poll for Democrats after the primary. Ohio: Sherrod Brown tries to return to the Senate In Ohio, the situation centers on the clash between the state’s Republican trends and the personal brand of Democrat Sherrod Brown. After JD Vance became vice president, his Senate seat was filled in January 2025 by Republican Jon Husted. The winner of the November election will serve out the remaining two years of Vance’s term. Brown represented Ohio in the Senate for 18 years, but in 2024 he lost to Bernie Moreno. Despite the state’s increasing Republican tilt (Trump won here by about 11%), Brown maintains a reputation as an economic populist with strong support from unions and workers. Recent polls explain why the Kalshi contract for a Democratic victory is trading at 51%. According to a Fox News survey (August 6–10), Brown leads Husted 53% to 45%. However, RealClearPolitics’ average shows a gap of less than one percent. Thus, Ohio becomes a test of whether a candidate’s recognition and authority can outweigh voters’ party preferences. Brown is the strongest possible Democrat, but he faces a tough fight in a traditionally Republican state. Texas: Unexpectedly fierce battle between Paxton and Talarico Texas has become the most active arena for traders: total trading volume on Kalshi for the two parties’ contracts has reached about $8.7 million. Here, Republicans nominated Attorney General Ken Paxton, who defeated four-term Senator John Cornyn in the primary. This victory demonstrated Paxton’s support among Republican voters, but his controversial reputation—due to legal, personal, and intra-party conflicts—makes the election outcome less predictable. Democrats nominated state legislator James Talarico—a former teacher and theology student who gained national attention for his speeches on religion, education, and economic inequality. Democrats haven’t won a statewide office in Texas since 1994, but Talarico is betting on a coalition of young voters, moderate suburbanites, and growing Black and Latino communities. According to the latest Emerson College poll, Paxton leads Talarico by just one percentage point—47% to 46% among likely voters. Other studies also show a minimal gap. On Kalshi, Republicans’ chances are estimated at 51%, Democrats’ at 48%, reflecting the market’s uncertainty about the stability of the Republican advantage. Probability table according to Kalshi State Republican victory contract (%) Democratic victory contract (%) Comment Alaska — — Exact data not specified, but the race is in the “toss-up” category Iowa 55 — Republicans are slight favorites Michigan — 57 Democrats are market favorites despite the Fox News poll Ohio — 51 Strong position for Brown, but the state is Republican Texas 51 48 Minimal gap, high trader activity Brief overview of key candidates and election formats Mary Peltola (Alaska): The first Alaska Native in Congress, known for her personal popularity and ability to attract voters from both parties. Dan Sullivan (Alaska): Incumbent Republican senator, twice elected with a comfortable margin. Ashley Hinson (Iowa): Member of the House of Representatives, supported by the national Republican Party. Josh Turek (Iowa): Paralympic champion and state legislator, won the primary with 63% of the vote. Abdul El-Sayed (Michigan): Progressive politician, former health department director, narrowly won the primary. Mike Rogers (Michigan): Nearly won the Senate race in 2024 despite an unfavorable environment for Republicans. Sherrod Brown (Ohio): Senate veteran, known for his ties to workers and unions, trying to reclaim his seat. Jon Husted (Ohio): Appointed senator in 2025, represents the Republicans. Ken Paxton (Texas): Attorney General, defeated the incumbent senator in the primary but is surrounded by scandals. James Talarico (Texas): Young politician, focusing on new electoral groups. An important feature of the voting procedures is Alaska’s use of ranked-choice voting, where voters can rank candidates by preference and the top four from the open primary advance to the final. In the other states, the classic system is used: the winner is determined by a single-round vote. Context: why these races matter so much The five states in the spotlight differ in political status. In Michigan, Democrats are defending their seat, while Alaska, Iowa, Ohio, and Texas are Republican territories where Democrats hope for success to achieve the necessary gain of four seats. On Kalshi, Democrats are already considered clear favorites in North Carolina—another open Republican state. Even if they win there and hold their own seats, they still need to win at least three out of four key Republican states. This distribution of odds explains why even races in traditionally Republican regions like Alaska and Texas are becoming central to the whole country. No single market will determine the outcome of the Senate battle, but even a small shift in one of these states could dramatically change the balance of power. What this means for PPPoker club players For PPPoker club members, this news is a great example of how dynamics and strategy in poker echo political processes. In the upcoming elections, as in a tough hand, much depends on the ability to analyze probabilities, account for unexpected twists, and not rely solely on past trends. Even clear favorites can find themselves in a vulnerable position if an opponent shows creativity and hits an “unexpected out”—as Mary Peltola is doing in Alaska, for example. The second practical takeaway is the importance of timely response to changes: prediction markets, like poker tables, quickly price in new information. Players should learn to adapt quickly to changing conditions, analyze not just the numbers but also the context, to make more informed decisions both in the game and beyond. Finally, the example of the elections shows that even minimal advantages—whether 51% versus 49% or a small chip lead—can be decisive. In poker, as in politics, it’s important not only to accumulate chips but also to defend your stack, be ready for opponents’ unexpected moves, and use all available resources to achieve victory.