Ossof is a conservative Democrat that is somewhat adept at co-opting a shaved down language of left wing economic populism(while functionally upholding the class interests of donors and the party status quo aligned with them). So he is good at tricking Dem party loyalists and pundit-brain rotted progressives into thinking he’s the next Obama.
Hence why he is also currently circulating as the new hot 2028 candidate from the Dem pundit and consultant mouthpieces in the media.
Mamdani is seeding enough people that can jump into that Senate race if AOC runs for president.
For instance I still contend the long play is to have Brad Lander run for Schumer’s seat
And depending on his ambitions I could see Mamdani running for governor of NY in 2030 and one of the NYC DSA reps challenging Gillibrand.
I think the question comes down to who are the states not on board that can now come on board and would it benefit them?
And unfortunately, the states that could sign on that now have trifectas according to the article are all benefitting from the current system: Nevada, Pennsylvania, Wisconsin, Michigan. Since they are swing states.
And several of them have presidential hopefuls that I am sure are trying to fundraise on the fact they can deliver those states. 2 of which are governors. So I think this is all a long way of getting to what the OP said…
TLDR: Most likely no, they will not sign on.
Democrats are the HR department of the Oligarchy