The best thing that would benefit the Democratic Party right now would be for former Vice President Al Gore to come out of retirement and just make the announcement that he is in the race.
My short list is getting shorter and shorter all the time by candidates dropping out or shooting themselves in the foot--that's why I'm no longer backing Senator John Edwards in 2008.
Al Gore was a former Senator and elected Vice President in 1992 and 1996. He won in 2000 but the court appointed George Bush as president.
I hope Gore does run. I'd support him over whoever is running so far.
After all, he would be the only candidate who starred in an Oscar-winning documentary (An Inconvenient Truth).