Democrats across the country were stunned on Sunday when Rep. Haley Stevens switched her endorsement from her former primary opponent, Abdul El-Sayed, to Republican Mike Rogers in Michigan's closely-watched Senate race. Reaction from top Democrats was swift and scathing, with Senate Minority Leader Chuck Schumer (D., N.Y.) referring to Stevens' move as "a despicable betrayal."
The sharp reactions underscore how Democrats worry the last-minute public defection in a key battleground state could hurt their chances to win back the Senate.
Michigan is seen as one of a handful of Senate races that could determine whether Democrats reclaim the chamber, where Republicans currently hold a 53-47 majority. Polls show a tight race between El-Sayed and Rogers, in what has been declared a toss-up by closely watched ratings site Cook Political Report.
To win the majority, Democrats need to flip a series of Republican states, with targets including North Carolina, Maine, Texas, Ohio and others. But they also need to defend their own territory, with Michigan at the top of the list. (Current Democratic Sen. Gary Peters is retiring.)
Although it has been decades since Republicans last won a U.S. Senate seat in Michigan, the state has emerged as a crucial swing state in recent presidential contests and was carried by President Trump in 2024 by roughly 1.4 percentage points. The battle between El-Sayed and Rogers has been one of the costliest this cycle, with more than $300 million spent on advertising in Michigan alone.