Michigan's Senate Primary

Michigan voters head to the polls Aug. 4 in one of the most closely watched Senate primaries in the country. The Michigan Senate primary 2026 features a contested Democratic field and a Republican race dominated by a familiar name, all competing for a seat that every major forecaster calls a toss-up in November.

Democratic incumbent Gary Peters is running for re-election, making this a race where an incumbent faces a primary challenge rather than an open seat. Three Democrats compete Aug. 4; two Republicans do the same. The general election is on Nov. 3, with 18 candidates from multiple parties on the ballot.

The Candidates

Democrats

Abdul El-Sayed is a physician and epidemiologist who served as director of the Department of Health, Human, and Veterans Services of Wayne County and the City of Detroit from 2023 to 2025. He first drew national attention with a 2018 run for Michigan governor and is back with a platform built around Medicare for All, campaign finance reform, and economic populism. He is challenging the incumbent from the left in the Michigan Democratic primary.

Haley Stevens is a three-term U.S. representative for Michigan's 11th Congressional District, first elected in 2018. She sits on the House Committee on Science, Space, and Technology, where she serves as ranking member of the Subcommittee on Research and Technology. Also, she serves on the House Committee on Education and the Workforce and the Select Committee on Strategic Competition Between the United States and the Chinese Communist Party. Her legislative record centers on manufacturing, pensions, and technology competitiveness.

Mallory McMorrow, a Michigan state senator representing District 8 who gained national prominence after a 2022 floor speech went viral, entered the race in April 2025 and suspended her campaign July 5. She remains on the Aug. 4 ballot but is no longer actively competing.

Rachel Howard and Travis Zollner also appear on the Democratic primary ballot.

Republicans

Mike Rogers represented Michigan's 8th Congressional District from 2001 to 2015 and chaired the House Intelligence Committee. He also served as a U.S. Army officer and FBI special agent. Rogers was the Republican nominee in the 2024 Michigan Senate race, narrowly losing to Democrat Elissa Slotkin, and is running again in the Michigan Republican primary. He enters the Aug. 4 contest as the heavy favorite.

Bernadette Smith, a former co-chair of the Michigan Republican Party, filed to challenge Rogers. Reports indicate the Michigan Board of State Canvassers did not certify Smith's nominating petitions following a May 2026 petition review; voters should confirm her current ballot status before Aug. 4.

The Money Behind the Race

Outside groups have spent $3,536,569 in independent expenditures in the Michigan U.S. Senate race 2026, according to Federal Election Commission data current through June 30.

The single largest spender is Americans for Prosperity Action (AFP Action), which accounts for $2,405,229, nearly 68% of all outside money in the race. SLF PAC, aligned with Senate Republican leadership, ranks second at $525,580. The Sentinel Action Fund has spent $251,258, and GLCF, Inc. has spent $157,500.

Democratic-aligned groups trail well behind. First Principles Digital has spent $91,847, Blue Michigan PAC $45,475, Blue Majority Project $15,000, Democratic Future PAC $14,084, and Blue Shift PAC $9,346. Senate Conservatives Fund has spent $7,352, directed against Peters.

The candidate-level breakdown makes the imbalance concrete. Mike Rogers has drawn $3,433,914 in total outside activity: $3,431,414 in support and $2,500 in opposition. Stevens has attracted $95,102 in outside support with nothing spent against her. Peters has seen $7,452 in total outside activity, with $7,352 of it in opposition. El-Sayed and McMorrow each have $50 in nominal outside support.

Ratings vs. Odds

Cook Political Report, Inside Elections, and Sabato's Crystal Ball all rate the Michigan Senate election forecast as a Toss-up. Cook's rating is current as of July 1, Inside Elections as of June 30, and Sabato's Crystal Ball as of June 11. The three organizations reached the same consensus rating as of July 23.

Prediction markets tilt modestly toward Democrats. Kalshi puts Democrats at 70% and Republicans at 30% as of July 26, on trading volume of roughly $278,000. The gap between the forecasters' Toss-up ratings and the markets' lean reflects the difference between structural competitiveness and current probability estimates: both point to a genuinely contested race in November.

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