Abdul El-Sayed (D), Mallory McMorrow (D), Haley Stevens (D), and two other candidates are running in the Democratic primary for U.S. Senate in Michigan on August 4, 2026. As of May 2026, El-Sayed, McMorrow, and Stevens led in polling, endorsements, fundraising, and local media attention.

Incumbent Gary Peters (D) is not running for re-election. Crain's Detroit Business' David Eggert said the primary is "Michigan’s first truly competitive Democratic Senate primary in 32 years." Local radio station WDET's Robyn Vincent said, "Three serious candidates are competing for the nomination, and the distance between them tells you something about where the party is right now."

El-Sayed is a physician and public health administrator who ran for governor in 2018. Vincent said El-Sayed "is running to the left of both [McMorrow and Stevens]. He wants Medicare for All, the abolition of ICE, and says Democratic leadership has lost touch with its own voters." El-Sayed's campaign website says he has "dedicated his career to building government agencies that actually work for Michiganders ... Abdul will fight to build a government that works for you, not Elon Musk, Donald Trump, or their billionaire friends." U.S. Sen. Bernie Sanders (I-Vt.) endorsed El-Sayed.

McMorrow was elected to the Michigan Senate in 2022. She earlier worked as an industrial designer and owned a small business. Vincent said McMorrow "wants generational change inside the party — new leadership, new tactics — but within the current system." McMorrow's campaign website says she is "running for the U.S. Senate because Donald Trump has put this country in a constitutional crisis and she believes that we need a new generation of leaders ready to stand up to Trump to protect our democracy and our fundamental rights and freedoms." U.S. Sen. Elizabeth Warren (D-Mass.) endorsed McMorrow.

Stevens was elected to the U.S. House in 2018. She earlier worked in the private sector and as chief of staff to the U.S. Auto Rescue Task Force under President Barack Obama (D). Vincent said Stevens "is running on expanding the Affordable Care Act and working within existing institutions." In a campaign ad, Stevens said, "Growing up in Michigan meant being surrounded by innovation, ingenuity, and pride in hard work. ... I always knew I wanted to spend my life fighting for Michigan." U.S. Sen. Catherine Cortez Masto (D-Nev.) endorsed Stevens.

Also running in the primary are Rachel Howard (D) and Travis Zollner (D).

As of May 2026, major election forecasters rated the general election Toss-up. The last Republican to win an election for U.S. Senate in Michigan was Spencer Abraham in 1994. In 2024, Donald Trump (R) defeated Kamala Harris (D) 49.7%–48.3% in the presidential election in Michigan and Elissa Slotkin (D) defeated Mike Rogers (R) 48.6%–48.3% in the senatorial election.