In my opinion, it is due to the lack of interest many people have in the 08 contendents. Nearly 50 % are saying Hillary. There is no way Hillary inspires people this way. So, I take it as a sign that the other people do not satisfy people.
I know I would love Gore to run, because, compared to those who run, he is one head above. But he said clearly yesterday he will not run (or at least it should be clear to those who remember how he announced he would not run in 2003).
I think Elias has it best, as often:
http://chimesatmidnight.blogspot.com/2007/02/al-gore-uber-alles.html
Al Gore Uber Alles
The Former Vice President, wins an Osar for Best Feature Length Documentary at last night's Academy Awards.
Even as I write this, there are activists with no small amount of organizational muscle and money who are staking all on a last ditch attempt to tempt Gore into running for President in '08.
There is out there, the annual democratic disillsionment with the current field concurrent with the eternal hope of someone from out Neverland who can unite the party and smite the GOP.
Alas Gore may not be interested and if Lieberman does jump to the GOP then there will be some hard questions asked about the former VP's judgement out on the campaign trail...to say nothing of the baying hounds of the DC Punditariat.