Vermont looked into single-payer insurance within the state borders, but AFAIK they abandoned the idea after seeing the estimated price tag. I think it would be

Vermont looked into single-payer insurance within the state borders, but AFAIK they abandoned the idea after seeing the estimated price tag. I think it would be great if some state tried implementing this, some state tried implementing a Singapore-style free-market solution, etc., and we got to see what worked.