US midterms 2026: Can Democrats flip four Republican-held Senate seats? 11 key races to watch, from Texas to Ohio

A Senate seat is “flipped” when the party holding it loses an election and the other party wins it. Here, Democrats want to take at least four Republican-held seats. That would expand their number of senators and move them closer to controlling the chamber.

For example, Democratic candidates are challenging Republicans in Texas, Kansas and Iowa. James Talarico is running against Ken Paxton in Texas, Adam Hamilton is challenging Roger Marshall in Kansas, and Josh Turek is competing with Ashley Hinson in Iowa. Each Democratic victory would count as one flipped seat.

The target is not enough by itself. Democrats also must retain every seat they currently hold, because losing even one of their own could cancel out a gain elsewhere. The article presents four flips plus complete Democratic defence as the route to reclaiming Senate control, though it does not predict the final outcome.

The 11 Senate races being watched are in North Carolina, Ohio, Texas, Maine, Alaska, Kansas, Iowa, Michigan, New Hampshire, South Carolina and Georgia. CNN assessed these contests using polling, advertising, fundraising, strategist conversations and each state’s political environment.

Several races have drawn particular attention. Roy Cooper leads Michael Whatley in North Carolina, while Sherrod Brown leads Jon Husted in Ohio. Texas, Kansas and Iowa are notable because Democrats are competing strongly in states that usually lean Republican. Alaska is close, and South Carolina has reached a statistical tie. Maine and Michigan also show Democratic leads.

Georgia is described as a less promising Republican pickup opportunity. Nebraska, Mississippi and Minnesota remained on the campaign radar but did not become fully competitive Senate races. The article stresses that this assessment is not a prediction of individual winners or overall Senate control.

Democrats’ stated goal is to flip at least four Republican-held Senate seats. A gain means adding a Democratic senator in a state currently represented by a Republican. The party is pursuing this ambitious target across 11 closely watched races.

The second requirement is equally important. Democrats must retain every Senate seat they already hold. If they gained four Republican seats but lost one of their own, their net improvement would be only three. If they lost several, the gains might not produce control of the chamber.

This is why Senate campaigns involve both offense and defence. Democratic candidates are challenging Republicans such as Ken Paxton, Roger Marshall and Dan Sullivan, while Democratic incumbents and open Democratic seats must also survive. The article describes four flips plus a clean sweep of existing Democratic seats as the route to reclaiming the upper chamber.

Senate control determines which party has the stronger position in the upper chamber. A Democratic takeover would give Democrats greater influence over the Senate’s agenda, debates, committee work and consideration of national legislation. A Republican hold would preserve their advantage.

The mechanism is electoral arithmetic. Democrats need at least four Republican-held seats while retaining all their current seats. Victories by candidates such as Roy Cooper, Sherrod Brown, James Talarico or Adam Hamilton could add Democratic senators. Republican victories in those races, or Democratic losses elsewhere, could block the takeover.

The stakes extend beyond individual states. The article says the 11 results could reshape the balance of power in Washington. It also notes that CNN’s assessment is not a prediction, so polling leads and spending advantages do not establish who will win or which party will control the Senate.

States such as Texas, Kansas and Iowa are becoming competitive because Democratic candidates have mounted stronger-than-usual challenges. Recent polling has put Democrats ahead or nearly level in each state, despite Republican strength in recent presidential politics. These contests show that a state’s usual partisan leaning does not automatically decide every Senate race.

The numbers illustrate the shift. James Talarico leads Ken Paxton in recent New York Times/Siena and CNN surveys in Texas. Adam Hamilton leads Roger Marshall 49% to 44% in Kansas. Josh Turek is at 46% against Ashley Hinson’s 45% in Iowa, even though Donald Trump won Iowa by 13 percentage points in 2024.

The wider political climate may be helping make these races competitive. Voters are focused on the economy, the war in Iran and corruption. Campaign spending, fundraising and individual candidates also matter, but the article does not identify one single cause.

Republicans hold a $39 million advertising advantage across the 11 key races. AdImpact data cited by CNN puts Republican spending at $560 million, compared with $521 million for Democrats. When Georgia and North Carolina are excluded, the gap rises to $81 million because Republicans sharply reduced advertising in those states.

Campaign spending can increase a candidate’s visibility. It can pay for television, digital and other advertisements, help define opponents, communicate a message and support voter-contact operations. The article also shows that spending varies by contest. In Ohio, Republicans spent about $141 million in October, compared with Democrats’ $102 million.

Money remains only one part of an election. Polling, fundraising, candidate strength, local conditions and voter concerns also shape races. Democratic groups outspent Republicans in Kansas, and Hamilton entered the final stretch with more cash available. Yet the article does not treat spending as proof of victory.

The US Senate is the upper chamber of Congress. Each state elects two senators, so every state has the same number of Senate votes. Senators represent their entire states rather than individual districts, giving the chamber a statewide and federal role.

The equal allocation is a foundational part of the US federal system. States differ greatly in population, but the Senate treats them equally in representation. This arrangement gives smaller states a stronger voice than they would receive if seats were distributed only by population. The House of Representatives provides population-based representation, creating a different balance.

That structure makes Senate elections nationally important. A party can win control through a small number of state contests, even when national population totals point in another direction. In the article’s races, voters in states such as Alaska, Kansas, Maine and Texas are choosing senators whose votes can affect the balance of power in Washington.