You see if you live in VT or MT, you can see Canada from your front porch.
Seriously, I would expect MA next. They are already partway there, are not in the throes of the tea party and maybe can begin to see how advantageous it would be to skip the middleman (the insurance companies). If that happens, MA is where I head. I have a son living in Boston.
When I first moved to Montreal, 44 years ago, it had government-run hospitalization but no government run medical care. That came after the federal government mandated it in 1971. The doctors went on strike, then the Quebec separatists kidnapped a couple of people (murdered one of them) demanding independence. This drove the doctor’s strike off the news headlines it just, as far as I recall, ended. Now my family doctor (originally American, BTW) wouldn’t want to practice any other way. He’s not wealthy, but clearly comfortable.