A lot of talk about the disfunction in the American system misses the point that it is functional. We don't have millions of people dying on the streets because they can't get health care.
We do spend a colossal amount on healthcare here, and there are definitely improvements that could be made. But we also have one of the least healthy populations on the planet.
Realistically to transition the USA to a socialized system you need to make the current system collapse. You won't succeed in major changes to a functional entrenched system like we have now.