Throughout 2009 and into early 2010, while the health reform we got nationally was being watered down by the corporate conservadems in the Senate, the Vermont legislature was moving forward. An important step was back in June 2010 when they decided upon the Harvard-MIT analytic group led by Prof. William S. Hsiao (who had done some of the modeling for Taiwan's transition from private insurance to single payer) and Jonathan Gruber (who did some of the modeling for the Obama-Baucus reform we got nationally).
They were charged with providing detailed policy and economic analysis of three possible proposals, two of which was to be variations of single payer. In Vermont, the least progressive proposal was the equivalent of the most progressive that the U.S. House of Representatives considered, being a relatively strong public option while leaving private insurance in place to compete. That was the charge from Vermont legislature, suggesting strong and real support for single payer.
In November, Democrat Peter Shumlin won election for Governor running explicitely on a single payer platform.