"Petty, selfish, unhinged": Haley Stevens' staff and colleagues erupt at her "betrayal"

Rep. Haley Stevens (D-Mich.) faced fierce backlash from fellow Democrats, party officials and her own staffers after endorsing Republican Mike Rogers for U.S. Senate on Sunday. Why it matters: It's a stunning reversal in standing for Stevens, who came within a few percentage points of being her party's nominee for Senate in Michigan just months earlier. "Pathetic, petty, selfish, unhinged," Rep. Jared Huffman (D-Calif.) told Axios of her endorsement of Rogers. "You run out of words." Rep. Sam Liccardo (D-Calif.) said of the video Stevens posted to social media announcing her endorsement and her joint press conference with Rogers: "I've seen more pleasant self-immolations." State of play: Stevens' endorsement of Rogers came after her long-running feud with Democratic nominee Abdul El-Sayed reached a boiling point over the weekend. El-Sayed, a leftist who narrowly defeated the more moderate Stevens in the Senate primary in August, said in a statement on Friday that Stevens "seems intent on relitigating a primary that ended three months ago." Stevens had been pressing El-Sayed to more forcefully condemn an ad from an outside super PAC that suggested U.S. aid to Israel was partly to blame for rising prices. Stevens, in her video endorsing Rogers, said that El-Sayed "said that I was no longer welcome in his campaign, and that I should stay away," adding, "He's right. ... I don't belong in Abdul's campaign." What they're saying: Stevens' Democratic colleagues met her endorsement with shock and fury. "I am lost for words," Rep. Lateefah Simon (D-Calif.) told Axios. Rep. Glenn Ivey (D-Md.) said in a text to Axios: "WTF!!??" "I JUST SAW THIS BULLSHIT," Rep. Emily Randall (D-Wash.) texted. "There is too much on the line for BS like this." "What the fuck is she doing?" another House Democrat said. "This election is not about her, and this will not age well." Zoom in: "I'm dumbfounded that Haley told me one thing last night and changed her mind today," said Rep. Jamie Raskin (D