Nader is not a member of the Greens. He's an indy who ran as the Green candiate.
Info on the Greens:
The Green Party -- the informal US-affiliate of the left-wing, environmentalist European Greens movement -- scored a major achievement when it convinced prominent consumer advocate Ralph Nader to run as their first Presidential nominee in 1996. Spending
just over $5,000, Nader was on the ballot in 22 states and carried over 700,000 votes (4th place - 0.8%). In 2000, Nader raised millions of dollars, mobilized leftist activists and grabbed national headlines with his anti-corporate campaign message. Nader ignored pleas from liberal Democrats that he abandon the race because he was siphoning essential votes away from Al Gore's campaign -- answering that Gore was not substantially different than Bush and that his own campaign was about building a permanent third party. In the end, Nader was on the ballot in 44 states and finished third with 2,878,000 votes (2.7%) -- seemingly depriving Gore of wins in some key states. More significantly, Nader missed the important 5% mark for the national vote, meaning that the party will still be ineligible for federal matching funds in 2004 (Note: a third Nader run is still possible as he said "I haven't ruled out going in 2004" in February 2002). Until 2001, the Greens are largely a collection of fairly autonomous state/local based political entities with only a weak (and sometimes splintered) national leadership structure that largely served to coordinate electoral activities. This faction -- formerly named the Association of State Green Parties (ASGP) -- is the larger and more moderate of the two unrelated Green parties. The ASGP voted in 2001 to convert from an umbrella coordinating organization into a formal and unified national party organization. Other useful Green Party links and information can also be found at the Green Parties of North America (unofficial), Green Information (unofficial), Green Pages (official online magazine), Green Party News Circulator (official - recent news clippings about the party) and Green Party Election Results sites (unofficial). The official youth wing of the party is the Campus Greens. Strong local Green Parties exist -- with ballot status -- in a handful of states. The Green Party Platform 2000 sets forth the party's official views. The Green Alliance is an officially sanctioned, national network of Green Party political clubs.