He’s the leftwing outsider who nearly became the Democrats’ candidate for president - twice. As his position on the Israel-Gaza war threatens to upset his support, the veteran senator says he’s tired but determined to fight the return of that ‘ bitter, humiliated man’
Unless he said "I am renouncing my affiliation with the Democrat party and am running for the office of President of the United States again" then whatever he says is incorrect.
He might as well just hand the election to Trump at that point. I mean, I get it, wrong lizard and what not, but in the real world that's really the only option in the immediate term.