Personally I disagree, I think the Liebercrats have mostly died off, the tenor of the debate within the modern democratic party has almost completely become “just a public option or complete wipeout of private medicine?”
Personally I think the best first step is just removing the age floor on Medicare. You’re eligible soon as ya come out the womb. The only other change you’d need to make immediately is mandating that doctors accept it if they want to remain licensed to practice.
Only takes one. Shit, until recently we had Sinema, and we still have Manchin.
Yes it only takes one, thing is though, it’s only a couple now, and the taboo against even questioning the filibuster has been broken by enough senators that a solid enough majority with a big enough agenda could be pressured into breaking the seal and launching a policy blitz.