The press release
The American Health Security Act of 2013. The part about repealing Title 1 of the PPACA (which includes the mandate) is on page 17.
Obviously this can't pass a Republican House, but this is exactly the direction we should be moving in. I actually suggested this course of action (and was lambasted for it) recently in the comment sections here. I think it's pretty commonsensical. People don't like the mandate. They do like Medicare.
Making this the Democratic platform for 2014 is the best shot of winning in 2014. The neoliberal approach to health reform obviously isn't working; shouldn't we give the socialist option a try?