Gore is in the pocket of the nuclear industry and a hard-boiled imperialist--it was he who admonished Bush, in the '00 campaign, for being soft on Iraq.
The major problems that afflict this country (and the rest of the world) cannot be solved or even reduced by the Democratic party because they, too, take orders from the ones really in power. I think that a third-party candidate and a massive popular uprising is what it will take and nothing sort of this will do a lick of good. This will send a clear message: the population are fed up and want a democratic alternative. Either the powers that be will take responsibility (unlikely) of they will be finished.
Since policy limits are predefined--it doesn't matter who you get; Gore or Clinton or Obama, politicians aren't independent. That's why a third-party (or a 100% transformed Democratic or Republican party--either would do) with a massive base of the general population is crucial--it is popular will not individual charisma and dynamism, of a "leader", that makes things happen in a democratic manner. If you want a Leninist then by all means support the Democrats as they are.