The Dems are to far to the left on economic issues for the electorate as a whole I think as ObamaCare and Stimulus were controversal. They should just move to the center on economic issues and learn that the government can't do everything. I believe if they suffer another "schollacking" as they did in 2010 this decade the party's platform on economic issue's will be re-evaluated. I do like their platform on social issues though and it is where it needs to be as most moderates agree with their platform on social issues.
Most of the electorate doesn't have clearly defined preferences in terms of policy. They are manipulated by public opinion polls, different kinds of media, politicians, and other figures and institutions. There's so much misinformation and disinformation out there about "Obamacare" and such that it's rather pointless to try to extrapolate anything from the (largely manufactured) "controversies."