Let's not make the mistake of believing that any of these people have any clue whatsoever about what they are talking about.  That said...

The question that you are asking is NOT ALLOWED TO BE ASKED within the circles that the people who support these platform planks hang out in.  I know this for a fact, because I used to be in those circles.

The real answer to the question requires that we ignore all of the rhetoric in this pamphlet and look at the situation as it is.  There is no path to just nationalizing insurance companies. It would not be allowed, and it would not work.  Right now the only path forward in the direction that this candidate for elected office is ranting about is by offering a public option as an alternative to the private health insurance companies, and then ensuring that this public health insurance company provides the services that the private companies are currently offering.  Good luck with that.  It is possible to do, but not a viable business plan.  Honestly at this point in time, doing this within a single State would just collapse the financial singularity and nobody would know what happened until diagnostics were done after the collapse.

Fundamentally, this cannot be done at the state level, because a state doesn't control their currency and the current medium of exchange in the US is another singularity extracting value from every transaction and expanding so fast and so far that there is no turning back.  We know this, we're bitcoiners.  Anything and everything built on that foundation is on the way to collapse, no matter how bright the red ink that is used in voter propaganda.

If and when any politician or candidate for office wants to get a clue about how to do something like this in the real world, they'll be asking that question here on Nostr.  Not door to door with paid volunteers.