Theory of governance is essentially what we do here. We work on a hypothesis that electing Democrats is the next and necessary first step, but, as Jerome a Paris says in his recommended diary, we need to talk about what we are going to do if we get in, and pick people in the primaries that will have a strong understanding of, and commitment to progressive principles.
But if we are going to advocate, people need to know precisely what it is we advocate, or at least the outside lines of what we will accept.
Subjects we must cover at a minimum are the ones that Dennis Kucinich has laid out so well on his website, including (necessarily) policy on war, checks and balances of powers among the branches of government and the people, accountability of civil servants, the responsibility of a government for basic civil rights to health, food, shelter, education, and a clean environment.
Hat tips to Jerome a Paris and Gooserock, our subtle sages.