Red-hot Kansas suddenly becomes a battleground for the Senate.

In a state that hasn’t elected a Democratic senator since 1932, Republican Sen. Roger Marshall suddenly finds himself in a tight race just weeks before the 2026 midterm elections.

A combination of stubborn inflation, headwinds from the White House’s trade policy and a formidable Democratic challenger in megachurch pastor Adam Hamilton has turned ruby-red Kansas into an unexpected Senate battleground.

The increasingly competitive race is forcing Mr. Marshall to balance a growing number of vulnerable Republicans. It’s about creating space from President Donald Trump on issues that pose domestic risks without alienating his support base.

“If Kansas’ incumbent Republican senator begins to run away from White House leadership, five alarm bells will ring throughout the party,” said Bob Beatty, a political scientist at Washburn University. “At a time when voters feel constrained at home, loyalty to Washington is becoming a burden.”

The Cook Political Report with Amy Walter on September 23 changed the race from “Republican-like” to “Republican-like.”

A September Emerson College/Nexstar poll of 750 likely Kansas voters found Mr. Hamilton with 45% and Mr. Marshall with 43%, making it a close race within the poll’s margin of error of 3.6 percentage points. The same poll found President Trump’s approval rating in Kansas was 40%, while his disapproval rating was 53%, with nearly half of likely voters listing the economy as their top issue.

The National Republican Group took note of this. Outside groups are now pouring millions of dollars into Kansas to defend seats that once sat safely outside the Senate battlegrounds. The problem is the Republican Senate majority.

Marshall has long been an ardent supporter of Trump. Trump carried Kansas by 16 points in 2024, but the senator has recently distanced himself from the state.

In September, President Trump threatened to ban U.S. sales of aircraft made by Canadian manufacturer Bombardier, potentially jeopardizing the future of many of the Wichita-based company’s roughly 1,500 jobs. Mr. Marshall offered little resistance to the broader trade dispute that sparked the threat, but claimed he joined the fight for local aerospace jobs “from inside the Oval Office.”

Meanwhile, farmers are being squeezed from both ends. Trade disputes and retaliatory tariffs are weighing on grain and soybean markets, as are fuel costs rising due to the Iran war. Diesel, which is essential for combines, tractors and transport trucks, rose nearly $1 a gallon over 30 days this harvest season, according to AAA.

Ranchers are also affected. President Trump took steps to lower tariffs on an additional 300,000 tons of lean beef trimmings imported in August to lower the price of ground beef.

“Intervening in Washington will do more harm than good,” said Matt Teegarden, chief executive of the Kansas Livestock Association. “Many member states want policymakers to make markets work.”

The association supported Marshall in both the 2016 House race and the 2020 Senate race. This year, he refused to endorse Marshall and Hamilton.

Meanwhile, Marshall offered a measured pushback against some of the Trump administration’s policies, calling for “targeted relief” in fuel costs and arguing that the administration had taken the wrong approach to food prices.

Immigration enforcement further complicated Marshall’s balancing act. Immigration and Customs Enforcement raids have swept across southwestern Kansas, home to some of the nation’s largest meatpacking plants and feedlots, stoking fear among immigrant workers.

“As workers stayed home, factory shifts were shortened, production lines slowed down, or shifts were canceled entirely,” Teegarden told CNBC. “The discontinuation of processing means that cattle remain in feedlots longer, raising costs in an industry already facing labor shortages.”

Marshall responded to X on Sept. 23 with a measured critique: “When ICE operates in Kansas, it has to work with local law enforcement. Our sheriffs and police know these communities better than anyone.”

In addition to Marshall’s problems, he also has his own controversies.

The New York Times reported on September 8 that Marshall, a doctor, has sued more than 700 patients at his practice over unpaid bills. The Times revealed that 81 patients were arrested after missing court dates. Lawyers also garnished patients’ wages and bank accounts, and patients were routinely charged 18% annual interest.

Democrats have also criticized Marshall’s ties to Florida, where he maintained his home.

The Marshall camp rejected both attacks. Marshall’s chief of staff, Brent Robertson, said the premise of Hamilton’s medical debt attack was “a lie on its face,” noting that the Kansas Bill of Rights prohibits debt imprisonment. He also said, “Senator Marshall lives in Kansas, and his mansion of over 300 acres is well maintained.”

Marshall’s tightening of the race is part of the Republican Party’s efforts to expand its field.

In August, Cook changed the Republican-led Senate races in Texas and Iowa to “toss-ups.” In September, he flipped Kansas toward the Democratic Party and put South Carolina on the competitive map. As of September 23, this publication assesses that it has full control of the Senate.

“When this cycle started, no one had Kansas on their bingo cards as a battleground,” said Kansas Democratic Party Chair Gina Repas.

Hamilton brings a unique crossover appeal to the race, political experts told CNBC. He spent three decades building the nation’s largest United Methodist congregation and entered the race with an established network far beyond traditional Democratic circles.

“Hamilton is extremely popular in areas that don’t even have Democratic candidates running for House or state legislative seats,” Ripass told CNBC, adding that Hamilton supporters are “knocking on every door” in some communities.

Mr. Hamilton’s background — he has previously registered as both a Republican and a Democrat, and briefly became an independent this year while considering an independent bid — also makes it easier for him to appeal outside the Democratic base, Mr. Beatty said.

“He has a system of permission for moderate Republicans and independents to cross the aisle,” Beatty told CNBC.

The appeal has received support from prominent former Republican governors. Bill Graves and Mike Hayden, and Marshall’s recent Republican primary challenger, Arch Narramore. Meanwhile, a September Emerson College poll showed Mr. Hamilton leading Mr. Marshall among independent voters, 42% to 27%.

“Kansas is not going to undergo an ideological realignment overnight,” said David Kensinger, a veteran Republican strategist and former chief of staff to Kansas Gov. Sam Brownback. “But voters are dissatisfied right now, and Hamilton is not in power.”

Hamilton’s strategy also relies on Kansas’ recent tendency to rebel against Republican orthodoxy.

Nearly 59% rejected an amendment that would have allowed lawmakers to further restrict abortion in 2022, three months after Democratic Gov. Laura Kelly was reelected. In 2025, enough Republicans resisted President Trump’s push for mid-decade redistricting to prevent a special session. And in August, voters overwhelmingly rejected a Republican-backed proposal to change how state Supreme Court justices are selected.

“Kansas remains a very red state,” Ripass told CNBC. “I just have purple veins.”

Despite the warning signs, Kansas Republicans have seen versions like this before.

Every Republican Senate candidate in Kansas has won by double digits since Bob Dole narrowly survived re-election in the aftermath of the Watergate scandal in 1974. More recently, in 2014, Republican Sen. Pat Roberts appeared to have a close race against independent Greg Orman, but won by about 11 points. Six years later, the race between Mr. Marshall and Democrat Barbara Bollier also appeared to be neck-and-neck in the final stages of the campaign, with Mr. Marshall winning by more than 11 points.

“Things like this happen on a regular basis,” Kansas Republican Party Chairman Danedri Herbert told CNBC. “Republicans who are adrift or undecided often return to the party as Election Day approaches.”

Marshall also has a significant financial advantage. As of July 15, the deadline for candidates’ primary FEC reports, his campaign had $5.4 million in cash, more than three times Mr. Hamilton’s $1.7 million.

But Republicans aren’t taking any chances.

On Friday, the Senate Leadership Fund, a super PAC aligned with Senate Republican leadership, paused additional spending in North Carolina while launching a multimillion-dollar ad campaign in Kansas to support Marshall, Semaphore reported. The group has secured nearly $8.2 million in Kansas through Election Day, according to AdImpact.

“Our mission is simple: help Republicans win across Kansas,” Herbert said. “The Senate race is too important to be taken for granted, and we are treating it as such.”