With two days left before voters go to the polls, the Kansas Senate race has become one of the most closely watched contests in the country, not because Kansas is usually competitive, but precisely because it usually is not. Republican Senator Roger Marshall is seeking re-election against Democratic challenger Adam Hamilton, and the final surveys of the campaign all point in the same direction: Hamilton is ahead, by a small margin in some polls and by a wider margin in others. That lead, if it holds on Tuesday, November 3, 2026, would end a drought stretching back to 1932, the last time Kansas voters elected a Democrat to the United States Senate. It would also reshape the arithmetic of Senate control, where Republicans currently hold a 53-47 majority and Democrats need a net gain of four seats to take charge of the chamber.
The polls do not settle anything by themselves. They are snapshots of voters surveyed on particular days, with margins of error that leave room for a different result on Election Day. But the consistency of the late-October picture is what has drawn national attention to a race that began the year as a contest most forecasters expected the incumbent to win comfortably. Three separate polls released in the final week of October each showed Hamilton in front, and the movement underneath those headline numbers — among independent voters and among people who had already cast a ballot — was even more striking than the toplines themselves.
What the final Kansas polls actually show
The Washington Post-Schar School poll, conducted October 22 to 26 among 801 likely voters, put Hamilton at 52 percent and Marshall at 43 percent, a nine-point lead, with a margin of error of 3.9 percentage points. The final Emerson College Polling survey, conducted October 26 to 28 among 800 likely voters, found a closer contest: Hamilton at 49 percent and Marshall at 45 percent, a four-point lead within a margin of error of 3.5 percentage points. A CNN survey conducted October 20 to 26 also showed Hamilton ahead by four points, 49 percent to 45 percent. Taken together, the three polls agree on the direction of the race while disagreeing on its size, which is exactly the kind of pattern that makes the final weekend so uncertain: the Democrat leads in every late survey, but the size of that lead ranges from a margin that could vanish on Election Day to a margin that would be difficult to overturn.
The pollsters themselves have urged caution about reading too much into any single number. The Washington Post and George Mason University researchers acknowledged that their survey could have overestimated Democratic support, because Democrats were far more enthusiastic than Republicans about responding to it. That kind of uneven response — sometimes called nonresponse bias — does not mean a poll is wrong, but it does mean its results should be treated as an estimate with extra uncertainty attached. Emerson’s researchers, by contrast, reported a steadier picture, with both candidates gaining ground since September: Hamilton rose from 45 percent to 49 percent, while Marshall rose from 43 percent to 45 percent. In other words, the Democrat did not so much take votes directly from the incumbent as win over undecided and previously uncommitted voters while the incumbent also consolidated some of his own support.
Libertarian candidate David Graham is also on the ballot, and his share matters in a race this close. Emerson put Graham at 3 percent, with 3 percent undecided, while the Washington Post survey put him at 4 percent. When Emerson asked undecided voters which candidate they leaned toward, Hamilton’s lead widened slightly, to 50 percent against 47 percent for Marshall. Forecasters have long rated the race as competitive but leaning Republican — the Cook Political Report rates it Lean Republican and Sabato’s Crystal Ball rates it Lean Republican — and those ratings reflect the state’s long Republican history as much as any single poll. The late polls, however, have forced even sceptical analysts to treat Kansas as a genuine battleground in the final days.
Why the Kansas Senate race matters for control of the Senate
The stakes go well beyond one seat in one state. Republicans hold 53 of the 100 Senate seats, counting the two independents who vote with Democrats as part of the Democratic total of 47. Democrats therefore need a net gain of four seats to reach a majority, and most of the seats they would have to win are in states that former President Donald Trump carried comfortably in 2024. Kansas fits that description: Trump carried the state by more than 16 percentage points in 2024, according to reporting on the race, yet the Senate contest there is now competitive. A Democratic win in Kansas would not by itself deliver the Senate, but it would change the path dramatically, reducing the number of other Republican-held seats Democrats would still need to flip and increasing pressure on Republican incumbents elsewhere.
Control of the Senate matters because it determines which judicial nominees are confirmed, which legislation reaches the president’s desk, and how aggressively the chamber investigates the executive branch. A Senate majority can block nominations and slow a president’s agenda even when the president’s party controls the House, and it can advance its own priorities when it works with a sympathetic House majority. That is why national party committees, outside groups and the White House itself have all paid close attention to Kansas in the closing weeks, even though the state rarely features in national Senate calculations. The Kansas seat is also important because of timing: it is one of the seats decided on November 3 itself, rather than in a later runoff, so its result will be known, subject to counting, on election night or soon after.
For Kansas voters, the national stakes sit alongside local ones. The state’s senators vote on farm policy, health care, energy and the federal budget, all of which touch Kansas agriculture, rural hospitals and small towns directly. The campaign has therefore tried to speak to both audiences at once: to Kansans weighing their own kitchen-table concerns, and to a national audience watching whether a traditionally Republican state is shifting. That dual focus helps explain why the race has attracted so much late money, advertising and presidential attention despite its historically uncompetitive profile.
Independents, early voters and the enthusiasm gap
If Hamilton’s lead has a single engine, it is independent voters. Emerson found Hamilton leading among independents by 59 percent to 25 percent, a 34-point margin that would be decisive in a state where unaffiliated voters have grown as a share of the electorate. The Washington Post survey pointed in the same direction, with Hamilton winning independents by a wide margin even as Marshall retained a strong base among self-identified Republicans. That pattern helps explain the overall topline: Hamilton is not winning by converting large numbers of Republicans, but by dominating the middle while holding his own Democratic base.
Early voting provides a second window into the same story. Emerson found that among voters who said they had already cast a ballot, Hamilton led by 66 percent to 32 percent, a margin far larger than his lead overall. Among voters who had not yet voted, the race was much closer, with Hamilton ahead by only 48 percent to 45 percent. That split does not predict the final result — early voters are not a random sample of all voters, and the composition of the electorate on Election Day itself could differ — but it does suggest that Democratic enthusiasm and organisation translated into banked votes before the final weekend, while Republican voters were more likely to be waiting until Tuesday.
Trump’s standing in the state adds context to both patterns. Emerson put the president’s job approval in Kansas at 45 percent approve and 51 percent disapprove, a net negative rating in a state he carried easily two years earlier. That does not mean voters are voting against Trump directly — Marshall is the candidate on the ballot, not the president — but it does suggest that the national political environment is less favourable to Republicans in Kansas than it was in 2024. Trump campaigned for Marshall at a rally in Park City on October 19 and gave an interview in Kansas City, Missouri, on October 30 in which he discussed the race, but the final polls suggest that presidential backing alone has not closed the gap.
The candidates and the closing arguments
Marshall, a physician and obstetrician-gynaecologist, has served in the Senate since 2021 after representing Kansas’s first congressional district in the House. His campaign has leaned on his record as a conservative legislator, his support for Trump and his argument that Kansas voters should send a Republican back to Washington to protect the state’s agricultural and energy interests. Hamilton, by contrast, is a senior pastor of the country’s largest Methodist parish, a background that has shaped his campaign’s emphasis on community, service and moral leadership. He has presented himself as an outsider to Washington politics, arguing that Kansas needs a senator who will listen to ordinary voters rather than follow party lines.
The campaign’s sharpest exchanges have come over Marshall’s record as a physician and as a public figure. The New York Times and USA TODAY reported that Marshall sued 700 patients for medical debt, resulting in 81 arrests, a claim Marshall has disputed. The dispute has become a fixture of the closing argument, with Hamilton’s supporters citing it as evidence that Marshall’s record does not match his image as a caring physician, and Marshall’s supporters dismissing it as a politically motivated attack. The episode illustrates how personal biography, rather than abstract ideology, has driven much of the race’s late advertising.
On policy, the final Emerson survey found voters naming the economy as their top issue, at 44 percent, followed by health care at 15 percent, threats to democracy at 13 percent, immigration at 7 percent and education at 6 percent. Those priorities cut across party lines in different ways: economic concerns favour the challenger when voters are dissatisfied with the national direction, while immigration and cultural issues tend to favour the incumbent’s party. Both campaigns have therefore spent the final week trying to frame the election around the issues where they are strongest, rather than accepting the other side’s framing.
What could still move the race in the final 48 hours
The final 48 hours will be decided by turnout, weather and the voters who have not yet made up their minds. Campaigns will spend the weekend knocking on doors, making phone calls and running advertisements aimed at the small slice of the electorate that remains undecided or that leans toward a third-party candidate. In a race where the leading candidates are separated by four to nine points, even a small shift in turnout among a particular group — young voters, rural voters, suburban women or independent voters — could change the outcome. Weather on Election Day can also matter, particularly in a state where many voters drive long distances to polling places.
Undecided voters and third-party supporters are the wild card. Graham’s 3 to 4 percent could prove decisive if his supporters break disproportionately toward one major candidate or stay home, and the 3 percent who told Emerson they were undecided could swing the race in either direction. Polls also have a second-order effect: when voters hear that a race is close, or that one candidate is ahead, it can affect their own decision to vote at all. That is why both campaigns have tried to project momentum in the final days, even as their internal polling may tell a more cautious story.
What happens on Tuesday will be known only when the votes are counted, and Kansas has a history of close races being decided late. But the final polls have already changed the story of this election: a race that began as a safe Republican seat is now one of the most closely watched contests in the country, and its result will be read, rightly or wrongly, as a verdict on the national mood two years into Trump’s second term. Whether Hamilton’s lead holds, narrows or reverses, the Kansas Senate race has become a test of whether a traditionally Republican state is willing to send a Democrat to Washington for the first time in nearly a century.
Sources
USN reviewed reporting from multiple outlets for this story. Read more from USA TODAY, Action Network and Election Tracker Live.