Kansas Senate Race: A Tight Contest Between Marshall and Hamilton

Republican Senator Roger Marshall is maintaining a slight lead in the Kansas Senate race, according to the latest polling data for what has become an unexpectedly competitive election in a traditionally Republican state. His chances of reelection have appeared to diminish following a contentious debate with Democratic opponent Adam Hamilton, a liberal pastor from a megachurch, at the Kansas State Fair on Saturday.

During the debate, Marshall faced significant opposition from the audience, which audibly expressed disapproval, particularly when Marshall defended his history of suing patients over unpaid medical bills. At one point, the crowd began chanting “shame on you” as Marshall responded to questions about a report by The New York Times that detailed his involvement in over 700 lawsuits against patients over the course of his medical career as an obstetrician-gynecologist.

The Kansas Senate race is being closely monitored as part of the 2026 midterm elections. Republicans are striving to retain their narrow Senate majority, facing the usual challenge of losing seats during midterms when the party in power typically experiences setbacks. The Democrats are looking at a challenging landscape, aiming to flip four Republican-held seats to gain control of the chamber.

Polls are revealing close contests in several conservative states. Democrats are viewing opportunities to make progress in Republican territories as President Donald Trump’s approval ratings have declined, driven by voter concerns regarding economic issues and the conflict in Iran.

Historically, Democrats have not won a Senate race in Kansas since 1932, and recent decades have shown they have not come near victory. However, polls are indicating a tight race in a state where Trump earned a 16-point lead during the 2024 election.

Vice President JD Vance is scheduled to visit Olathe, Kansas, on Monday to express support for Marshall, emphasizing the significance of the race. Newsweek reached out to both Marshall and Hamilton’s campaigns for comments beyond standard business hours.

Marshall vs. Hamilton: Polls and Predictions

Marshall remains the preferred candidate, though some polls indicate the race is close. A co/efficient poll conducted between September 8 and 10 among 915 likely voters revealed Marshall in the lead over Hamilton, at 49 percent to 44 percent, with 5 percent undecided. The poll’s margin of error stood at plus or minus 3.22 percent.

Other recent surveys are suggesting narrowing margins. A Global Strategy Group poll from August found Hamilton ahead, 44 percent to 43 percent, although his lead fell within the survey’s margin of error of plus or minus 3.5 percent. A poll in early August by Public Policy Polling showed Marshall narrowly ahead at 46 percent to Hamilton’s 45 percent, though the margin of error was not specified.

Election analysts have adjusted expectations for the race since Hamilton secured the Democratic nomination in August, making it more competitive. The Cook Political Report altered the status from “solid Republican” to “likely Republican” after his primary victory.

Prediction markets remain favorable to Marshall. Kalshi assigns Marshall a 79 percent chance of winning compared to Hamilton’s 21 percent. Similarly, Polymarket forecasts an 80 percent probability for Marshall and 21 percent for Hamilton.

Marshall’s Medical Billing Controversy

The New York Times reported that Marshall had pursued over 700 lawsuits against patients for unpaid bills, which ranged from $101 to several thousand dollars during his lengthy medical career. Around 81 patients were arrested for missing related court dates.

Approximately half of the lawsuits were filed under Marshall’s name, and the rest by the Great Bend medical practice he owned from 1998 to 2012 and co-owned until 2019. Most cases involved residents of Barton County, an area with higher-than-average uninsured rates and poverty levels.

An annual interest charge of 18 percent was levied on outstanding bills, with some patients having their bank accounts garnished. Steven Johnson, an attorney often representing Marshall, stated that warrants and arrests ensured attendance at court proceedings.

Marshall’s campaign defended his record, noting that he treated patients regardless of payment ability, and emphasized that judges, not doctors, issued warrants. Payton Fuller, Marshall’s campaign spokeswoman, stated the hospital provided millions in uncompensated care and followed standard billing practices in Kansas.

Roger Marshall’s Favorability

The latest co/efficient poll revealed Marshall’s favorability rating below water, with 42 percent of respondents viewing him favorably and 44 percent unfavorably. Despite this, he maintained a five-point lead over Hamilton, indicating that some voters dissatisfied with him may still prefer him to the Democratic candidate.

Hamilton’s favorability rating was positive, with 34 percent favorable and 27 percent unfavorable views. However, Hamilton remains relatively unfamiliar to some voters, with 39 percent indicating no opinion of him compared to 14 percent for Marshall.

Who Is Adam Hamilton?

Hamilton, running for office for the first time, is the founder of Church of the Resurrection in Leawood, identified as the nation’s largest United Methodist Church. He built the congregation from a modest start in 1990 to a 25,000-member body across nine Kansas City locations.

Gaining national prominence through over 30 books on Christian theology, Hamilton secured the Democratic nomination in August by campaigning as a faith-driven moderate capable of appealing to conservative Kansans. He raised $3.6 million in the initial two months of his campaign, drawing Democratic attention to the race.

Marshall characterized Hamilton as “too woke for Kansas.” Despite this, Hamilton portrayed himself as a centrist advocating “bringing people together,” noting an even partisan division within his congregation among Democrats, Republicans, and independents.

During the debate, Hamilton sharply criticized Marshall’s positions on Trump’s trade policies, healthcare cuts, and foreign policy decisions.