The Green Party of the United States (GPUS) is one of the political parties in the United States, and similar in mission to many of the worldwide Green Parties. The Greens, a voluntary association of state parties, have been active as a nationally recognized political party since 2001. Prior to formation nationally many state affiliates had already formed and were recognized by their corresponding states.
The Association of State Green Parties (ASGP) (a forerunner organization) first gained widespread public attention during Ralph Nader's presidential runs in 1996 and 2000. With the founding of the Green Party of the United States, the party established a national political presence becoming the primary national Green organization in the U.S. eclipsing the earlier Greens/Green Party USA which emphasizes non-electoral movement building. The Green Party in the United States has won elected office mostly at the local level; most winners of public office in the United States who are considered Greens have won nonpartisan-ballot elections (that is, the winning Greens won offices in elections in which candidates were not identified on the ballot as affiliated with any political party).
The highest-ranking Greens ever elected in the nation were John Eder, who was a member of the Maine House of Representatives until his defeat on November 7, 2006, Audie Bock, who was elected to the California State Assembly in 1999 but switched her registration to Independent seven months later running as an independent in the 2000 election, and Richard Carroll, who was elected to the Arkansas House of Representatives in 2008 and will assume office in 2009. In 2005, the Party had 305,000 registered members in states that allow party registration, as well as tens of thousands of members and contributors in the rest of the country. During the 2008 elections the party had ballot access in 31 states.
The Green Party of the United States of America emphasizes environmentalism, non-hierarchical participatory democracy, social justice, respect for diversity, peace and nonviolence. Their "Ten Key Values," which are described as non-authoritative guiding principles, are as follows: