Unfortunately right now, we probably don't have the luxury of the Greens. In 2000, I voted for Nader, believing that both the Dems and GOP were 'feeding from the same trough'. Well, that was indeed correct - and at the same time not. Members of both parties can get caught in the same kind of misbehavior or scandal(s). What they're good at when they get caught (the GOP) is noting those instances where a Democrat has been found doing something similar then muddying the water with the general statement that 'see, they're both the same' and no one is really any worse than the other. The difference is the SCALE and INTENT. With the GOP, it is systemic, top-down, organized and pervasive. Democrats who get caught doing something illegal (like William Jefferson of New Orleans) typically are acting on their own and not part of an organized political effort. Tom Delay & Co. used political extortion to shake down and intimidate everyone - even people in his own party. He started the infamous 'K Street Project' which was an premeditated effort to isolate and blacklist any lobbying group that talked with/to or worked for ANY Democrat. The intent was to neuter the Democrats and cut off equal access to lobbyist and to intimidate those lobbyists from working with anyone but republicans.
If we splinter off right now, even by just a few single percentage points like we did in 2000, we guarantee that the republicans will have this country by the neck for another four years. If you want to see Democrats who are actually standing up and fighting back (unlike most in the Democratic party), try out the PROGRESSIVE DEMOCRATS OF AMERICA. They are a good fit with the Greens, but are technically part of the Democratic party, and as such provide a lot more political pull to those of us who feel disaffected and let down by the traditional DNC/DLC. And they have actually been effective!
Go to: http://pdamerica.org/