It will be very interesting to see how the below does in November in Colorado. If this passes and is successful it could act as a catalyst for other states to try the same. Like many progressive issues before it (Same-sex marriage, weed legalization etc) single payer universal healthcare in the US might go through the states first. The insurance, pharmaceutical, and hospital industries know this and are working hard to see it defeated.
http://www.coloradocare.org/