Whitmer backs Haley Stevens in Michigan's heated Senate primary

Gretchen Whitmer endorsed Rep. Haley Stevens in Michigan’s Democratic Senate primary, putting the state’s governor squarely behind the establishment favorite in a race that has become a test of who controls the post-Peters Democratic bench. The backing matters because the seat is open: Sen. Gary Peters is retiring after 12 years, and the contest has been among the most closely watched Democratic primaries in the country.

Stevens, a four-term congresswoman from Birmingham, has tried to frame herself as a pragmatic “workhorse” with a record of delivering for Michigan. That pitch draws on her service on the Obama administration’s auto industry rescue task force during the 2009 financial crisis, a credential that still carries weight in a state where the auto sector remains central to Democratic politics.

Whitmer’s move also deepened the establishment lane around Stevens. Peters has already endorsed Stevens as his successor, and so have Nancy Pelosi, former Michigan Gov. Jennifer Granholm, former Sen. Debbie Stabenow, Rep. Jim Clyburn, EMILY’s List and a voting rights group. With the governor now joining that list, Stevens has the support of much of the party’s institutional hierarchy in a race against progressive Abdul El-Sayed.

The field narrowed sharply on July 5, 2026, when state Sen. Mallory McMorrow suspended her campaign, leaving Stevens and El-Sayed in a two-way fight. That change gave extra significance to Whitmer’s endorsement, which a July 14 poll story commissioned by The Detroit News and WDIV-TV said could be pivotal if Whitmer chose to use it.

Whitmer had not endorsed any Democrat when Peters spoke at the Mackinac Policy Conference in late May, a signal that she was keeping her options open while the primary took shape. By July 21, she said she was concerned about the “rhetoric” in the race and the “online ugliness,” underscoring how bitter the contest had become even before the final stretch.

For Michigan Democrats, the endorsement is more than a candidate preference. It is a marker of where the party’s governing class wants the Senate succession to land, and it places Whitmer at the center of a fight over whether that influence consolidates power or sharpens the party’s existing fault lines.