Missouri's 4th District Primary

Eleven candidates across three parties will compete in the Missouri 4th District primary 2026 on Aug. 4, with Republican incumbent Mark Alford defending his seat against two intra-party challengers while eight Democrats fight for the right to face him in November.

Missouri uses a traditional partisan primary system: each party holds its own separate contest, and the top vote-getter in each advances to the general election. There is no top-two mechanism, no jungle primary, and no ranked-choice voting. The general election follows on Nov. 3.

The 4th is one of eight U.S. House districts in Missouri, electing a single representative. Every major race-rating organization classifies it as Solid Republican, and prediction markets put the Republican nominee's odds of winning the general election at better than nine in 10. No prior general election vote totals appear in the available data for a direct historical comparison, but the unanimity of the ratings reflects a district with a durable Republican lean.

The real contest on Aug. 4 is twofold: whether Alford survives his primary, and which of seven Democrats emerges to carry the party's banner in a race the ratings say they are unlikely to win.

The Candidates

Republicans

Mark Alford spent roughly 25 years as the lead morning anchor at Fox 4 News in Kansas City before winning the 4th District seat in 2022. In the House, he sits on the Armed Services Committee and the Agriculture Committee, the same panels held by his predecessor. He faces two Republicans challenging him in the Aug. 4 primary.

Heather Shelton, a realtor from Lee's Summit, is seeking elected office for the first time. Scott Vera rounds out the Republican field as the second challenger to Alford.

Democrats

Seven candidates are competing in the Democratic primary for Missouri's 4th Congressional District, an unusually crowded field for a seat rated solidly out of reach for the party.

Hartzell Gray, a former radio host and community organizer who describes himself as a lifelong Kansas Citian, is running on a Democratic Socialist platform centered on Medicare for All, affordable housing, and economic justice. He has drawn the endorsement of Kansas City DSA and outside financial support, the only candidate in the entire field to attract any independent expenditures.

Jordan Herrera is a U.S. Air Force veteran with more than 16 years of service who has also served as an assistant attorney general for Missouri. He has positioned his campaign around public service and economic security.

The remaining five Democratic candidates are Jeanette Cass, Randy Miller, Ashleigh Rogers, Wayne Russell, and G Rick.

Libertarians

Thomas Holbrook is the sole Libertarian primary candidate and will advance automatically to the general election ballot.

The Money Behind the Race

Outside spending in the Republican primary for Missouri's House District 4 election is zero. Not a single independent expenditure has been filed in support of or in opposition to Alford or either of his challengers.

The only outside money in the entire race flows to the Democratic side. Through June 30, Rebellion PAC has spent $1,075 in support of Democratic candidate Hartzell Gray. That is the full extent of outside spending in the race. No communication costs have been reported by any committee. Total independent expenditures across all candidates and all parties stand at $1,075.

All 11 candidates combined have raised $1,725,582, according to available data. The outside spending figure of $1,075 represents a fraction of a percent of that total, underscoring how little outside interest the race has attracted beyond the candidates' own fundraising.

Ratings vs. Odds

Cook Political Report, Sabato's Crystal Ball, and Inside Elections each rate Missouri's 4th Congressional District as Solid Republican. Cook and Sabato issued their ratings as of July 16; Inside Elections' rating is current through June 30. The consensus rating, aggregated as of July 23, is Solid Republican across all three outlets.

On Kalshi, the Republican nominee carries a 90.2% probability of winning the general election as of July 26, with the Democratic nominee at 9.8%. That market has seen 1,603 contracts traded, a modest volume consistent with a race where the November outcome is not considered in doubt. The primary contests on Aug. 4 will determine who fills those roles.

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