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The notion that the primary races where its Dem against Dem prove anything about electability of Dem against Pub, is a flawed argument. It's bad research because the population in your experimental data (primaries) is not the same as the population in the General Election (bipartisan). The changing conditions between now and then are also a key factor that the research just doesn't shed any light on. Conditions are changing all the time.
You seem to relish the scenario of a party divided in bitterness, putting down our chances -- unless we act out of fear. Sounds way too much like Bush's hawk-song to me. And Hillary bought all that crap -- which loses the anti-war vote.
Another scenario is where the anti-Obama activists like yourself decide to lay down this unproductive rancor and embrace some new blood. Embrace us with the counsel of your years, share your experience, instead of this name calling and naysaying -- we've seen the disasterous future that the status quo in Washington has laid at our feet. Some inheritance! Global warming, monster storms, endless war, inflation, empty rhetoric in place of a dream. We need to rally a generation out of this cynicism and apathy -- I know it's a hard thing for the cynical to see -- but it's the only chance we've got. Obama really can inspire us if you'll help clear the way instead of blocking the future.