Las Vegas sounds like it was an important political milepost. Let's hope it produces a pithy formulation of what makes someone a progressive, namely, the commitment to
(1) use public resources and power to make life better for those who live and work in this country, and (2) reduce dramatically the economic inequality between the few who control most of the nation's wealth and the many who actually create it.
All other issues, including, ending the War, protecting abortion, supporting gay marriage, etc., should orbit around these core committments.
If they don't, then we may as well be moderate Republicans, who famously declare themselves conservative on economic issues but liberal when it comes to social issues--and if you haven't noticed, moderate Republicans are an endangered species these days . . .