Kansas Senate Race: Marshall vs. Hamilton

Republican Senator Roger Marshall is maintaining a slim lead in the Kansas Senate race, according to the latest poll of the highly contested election in what is usually a Republican stronghold. However, his chances of reelection have possibly decreased after experiencing a challenging crowd in his initial debate against Democratic challenger Adam Hamilton, a liberal megachurch pastor. This took place at the Kansas State Fair on Saturday.

During the debate, Marshall encountered many boos, and at one point, the audience chanted ‘shame on you’ as he justified suing patients over unpaid medical bills. The debate moderators referenced a September 8 report by The New York Times which revealed Marshall had filed over 700 lawsuits against patients for unpaid bills throughout his long career as an obstetrician-gynecologist. This Senate race in Kansas is among the most closely watched contests of the 2026 midterms.

The Republicans are attempting to keep their narrow Senate majority, which presents a challenging scenario as the party in power typically loses seats in midterm elections. Democrats need to overturn four Republican-held seats to regain control of the Senate. Several traditionally conservative states have shown unexpected competitiveness in the polls, with Democrats targeting Republican regions as President Donald Trump’s approval ratings drop due to economic concerns and the war in Iran.

Kansas has not seen a Democratic win in a Senate race since 1932 and has come nowhere close in the past half-century. Nevertheless, multiple polls suggest a tighter race this year in a state that Trump won by 16 points in the 2024 election. Vice President JD Vance plans a visit to Olathe, Kansas, on Monday to support Marshall, emphasizing the race’s significance.

Marshall vs. Hamilton: What the Polls and Prediction Markets Say

Marshall is still favored, yet polls indicate the race might be close. A poll by Co/Efficient conducted from September 8 to 10 among 915 likely voters showed Marshall ahead of Hamilton 49% to 44%, with 5% undecided. The poll’s margin of error is ±3.22%.

Recent surveys have displayed even tighter competition. A Global Strategy Group poll from August 12 to 16 with 800 likely voters saw Hamilton narrowly leading 44% to 43%, within the margin of error of ±3.5%. Another poll from Public Policy Polling conducted August 7 to 8 showed Marshall slightly ahead 46% to 45%, though the margin of error was not specified.

Election analysts have acknowledged increased competitiveness in the race since Hamilton’s Democratic nomination in August, although Marshall is still seen as likely to win. The Cook Political Report shifted Kansas from ‘solid Republican’ to ‘likely Republican’ after Hamilton’s primary win.

Prediction markets continue to favor Marshall more strongly. Kalshi grants him a 79% chance of victory, against 21% for Hamilton. Polymarket similarly gives Marshall an 80% likelihood compared to Hamilton’s 21%.

Roger Marshall Sues Patients: What to Know

The Times reported that Marshall initiated lawsuits against more than 700 patients over unpaid bills ranging from $101 to thousands over his career as a doctor. Approximately 81 patients were arrested for missing court appearances related to those suits.

Half of these lawsuits were filed under Marshall’s name, while Heartland Regional OBGYN, his then solely owned and later co-owned practice, filed the rest. Most of those sued were from Barton County, where the insurance coverage rate and poverty levels are higher than average. Reports showed an annual interest rate of 18% was charged on outstanding debts, and some had bank accounts garnished.

Attorney Steven Johnson, often representing Marshall in debt cases, defended the court enforcement actions as necessary to compel appearance at court dates. Marshall’s campaign argued he treated patients regardless of payment capability, noting that judges, not doctors, issued the warrants.

Payton Fuller, Marshall’s campaign spokeswoman, stated that the hospital gave millions in uncompensated care and utilized the usual billing and collection practices like other hospitals in Kansas.

Roger Marshall Approval Rating

A Co/Efficient survey found Marshall’s favorability rating negative, with 42% viewing him favorably and 44% unfavorably. However, he still led Hamilton by five points, indicating some voters may support him despite negative opinions.

Hamilton’s favorability rating was positive, with 34% favoring him and 27% unfavorable, though 39% expressed no opinion about Hamilton compared to only 14% for Marshall.

Who Is Adam Hamilton?

Hamilton, a first-time candidate, founded Church of the Resurrection in Leawood, the largest United Methodist congregation in the U.S. He expanded the church from a few members meeting in a funeral home chapel in 1990 to a 25,000-member congregation with nine locations around Kansas City.

He gained national recognition through over 30 books focusing on Christian theology, securing the Democratic nomination in August as a faith-based moderate capable of engaging conservative Kansans. His campaign raised $3.6 million during its first two months, leading Democrats to see potential competitiveness in Kansas this election.

Marshall has labeled Hamilton as ‘too woke for Kansas.’ Hamilton, however, speaks of a centrist approach, focusing on unity. His congregation includes a diverse political mix, reflecting this stance.

During the debate, Hamilton criticized Marshall’s stance on Trump’s tariff policies, healthcare reductions, and foreign policy decisions.

Reported by Daniel Orton and Robert Greenall.