Sen. Elizabeth Warren, D-Mass., has endorsed Abdul El-Sayed in the Michigan Democratic primary for the U.S. Senate seat, diverging from Senate Minority Leader Chuck Schumer, D-N.Y., who is backing Rep. Haley Stevens. This split endorsement underscores a broader internal conflict within the Democratic Party between its progressive and establishment factions.

Warren's endorsement, announced Monday, focused on El-Sayed's commitment to refusing corporate funding and his policy positions. "Abdul is the only candidate in this race who can build the grassroots movement needed to win in November," Warren stated in an endorsement video. "More money in your pocket, to get money out of politics and deliver ‘Medicare-for-all.’"

El-Sayed, a former primary candidate and physician, has positioned himself as a challenger to corporate influence in politics. He has previously stated that interests such as ICE and health insurers should view him as "dangerous." He has also faced scrutiny for past social media posts, including remarks on reinvesting tax dollars from police budgets.

Schumer, on the other hand, has publicly supported Stevens, believing she has the strongest chance of winning the general election. Stevens has garnered support from several other Democratic senators, including Sens. Ruben Gallego, D-Ariz., Chris Coons, D-Del., and Gary Peters, D-Mich. El-Sayed's campaign has attracted endorsements from other progressive figures, such as Sen. Bernie Sanders, I-Vt., and Rep. Alexandria Ocasio-Cortez, D-N.Y., along with Warren. He has also received support from Sen. Chris Van Hollen, D-Md., and Rep. Ro Khanna, D-Calif.

El-Sayed views his candidacy as a challenge to the traditional Democratic establishment, particularly its reliance on corporate funding. He told Politico that Schumer and other party leaders are concerned about his platform to eliminate corporate money from politics. "So, of course, they’re freaking out," El-Sayed said. "They’re not freaking out because they think I’m going to lose. They’re freaking out because they think I’m going to win."

Warren had previously endorsed Michigan state Sen. Mallory McMorrow in the same race, but McMorrow withdrew her candidacy earlier in the month. McMorrow had not supported "Medicare-for-all," a key progressive policy championed by Warren.

The primary contest in Michigan is seen as a significant test for the progressive movement within the Democratic Party. The diverging endorsements from prominent Senate Democrats highlight the ideological tensions as the party navigates its direction for future elections.