Michigan's 4th District Primary

Republican Rep. Bill Huizenga faces a primary challenge Aug. 4 in Michigan's 4th Congressional District, while Democrats in the same district hold their own contested primary the same day. Both races feed into a November general election that raters call Lean Republican.

Michigan runs partisan primaries: registered voters in each party choose their nominee separately, with no top-two or ranked-choice element. The winner of each Aug. 4 primary advances directly to the Nov. 3 general election. Five candidates are currently listed on the general election ballot across all parties.

The 4th District covers western Michigan, including areas along the Lake Michigan shoreline. Huizenga won reelection in 2024 with 55.1% of the vote.

The Candidates

Huizenga has held a western Michigan House seat since 2011, first in the old 2nd District and then in the redrawn 4th after redistricting took effect in 2023. In the 119th Congress, he serves as vice chair of the House Financial Services Committee, with a subcommittee assignment covering digital assets, financial technology, and artificial intelligence. His recent legislative work includes sponsoring the Stress Testing Accountability and Transparency Act. Before Congress, he served in the Michigan state House and as a staffer for former Rep. Peter Hoekstra.

Philip Tanis, the former mayor of Holland, launched his primary challenge in May 2026. Tanis was among the youngest mayors in the country when Holland first elected him in 1987, and his decades in that city's civic life give him a base in Ottawa County, a core part of the district. He is running on a platform of what he calls "thoughtful, constitutional, principled Republicanism."

J. Allen Fiorletta also appears on the Republican primary ballot. His FEC candidate ID is on file, but no additional public information about his background or campaign platform was available at the time of publication.

Sean McCann, a state senator from Kalamazoo, enters the primary as the field's most prominent Democrat. His record in Michigan public life spans the Kalamazoo City Commission, where he served from 1999 to 2008, the Michigan state House from 2011 to 2015, and his current state Senate seat. The Democratic Congressional Campaign Committee (DCCC) added him to its candidate mentorship program, and he has drawn endorsements from Gov. Gretchen Whitmer and Rep. Hillary Scholten.

Diop Harris, a Battle Creek native and Michigan State University alumnus, worked on Capitol Hill as a staff assistant and legislative correspondent in the office of former U.S. Sen. Sherrod Brown of Ohio. He is running on a pledge to reject corporate PAC money and focus on working families in Southwest Michigan.

Richard Aaron is also running in the Democratic primary. Verified biographical details were not available at the time of publication.

The Money Behind the Race

Outside spending in the Michigan 4th Congressional District 2026 race is negligible. Through June 30, two committees reported a combined $271 in independent expenditures, with no communication costs filed. No outside group has spent a dollar opposing any candidate.

Right to Life of Michigan Victory Fund leads all outside spenders with $239 directed in support of Huizenga. GiveGreen United Action reported $32 in support of McCann. Every dollar of outside money in this race is supportive; the opposition spending column sits at zero.

The total raised across all candidates in the race reached $7,197,914, suggesting the bulk of spending flows through the campaigns themselves rather than outside groups.

Ratings vs. Odds

Cook Political Report, Sabato's Crystal Ball, and Inside Elections all rate the Michigan House District 4 race as Lean Republican. Cook and Sabato issued that rating July 16; Inside Elections last updated June 30. The consensus rating, as of July 23, holds at Lean Republican across all three.

Kalshi puts Republicans at 63.9% to win the seat and Democrats at 36.1%, based on $6,820 in trading volume as of July 26. The market and the raters point in the same direction: Republicans are favored, but the seat is not out of reach for Democrats.

---

Spot something wrong? Report an issue with this article