The post in question was published on X and had been viewed roughly 968,000 times by the time it was reviewed. Its central assertion is twofold: that El-Sayed now refuses to work with Democrats, and that he is launching a party of his own. The claim also carries a framing — that he used the Democratic primary, accepted Democratic support, and is now abandoning the party that elected him — which only holds up if the two factual assertions do.
On the first assertion, the reporting runs directly against the post. In a CNN interview on Thursday, Nov. 5 — two days after his election-night victory — El-Sayed was asked about working with the president and vice-president. He said he would "take every opportunity" to distinguish between what JD Vance says and what he does, and called the pair "odious" in how they behave outside their official roles. But in the same exchange he also said he would work with them: "I'll work with anybody to serve the people of the state of Michigan. If they're serious about doing that, let's get some stuff done." A politician who has just publicly committed to working with a Republican White House is, by any ordinary reading, not refusing to work with his own party's caucus.
The wider coverage of his transition reinforces that picture. Reporting from Nov. 6 describes El-Sayed naming a former Kamala Harris campaign aide, Brenda Abdelall, to help lead his transition — a staffing move inside the Democratic coalition, not a break from it. The same reporting notes that his rise has exposed deep divisions within his own party over Israel policy, but internal friction is a long way from secession. The Guardian's Nov. 6 profile describes him as heading to Washington as "one of the most visible Democrats to have emerged from this election cycle," and quotes a Democratic-aligned outside group leader predicting that the Senate caucus "is going to give him some leadership position." That is not the language of a man starting a rival party.
On the electoral history in the post, there is no dispute: El-Sayed did run as a Democrat, did win a contested three-way primary in August against centrist U.S. Rep. Haley Stevens, and did accept Democratic support — including from Bernie Sanders, Alexandria Ocasio-Cortez and the UAW — on the way to beating Republican Mike Rogers by roughly seven points. He will be sworn in in January as the first Muslim elected to the U.S. Senate, joining a new Democratic majority. Those facts are accurate, but they describe the ordinary path of a successful primary candidate, not a politician plotting an exit.
The one element of the post that has a kernel of real-world context is his willingness to break with party orthodoxy on Israel, where he has called for ending military aid and described Israel's campaign in Gaza as genocide. That stance has put him at odds with moderate Democrats and prompted Stevens to endorse his Republican opponent days before the vote. But a policy fight inside the party is not the same as refusing to work with Democrats or founding a new one, and the post supplies no quote, date or document to support either of its central assertions. The claim as written is not supported by the reporting from the days immediately after the election.