Civil rights activist Peter Miguel Camejo, an advocate of third party politics, died early today at his home in Walnut Creek, according to Ralph Nader, who notified The Bee in an e-mailed tribute. ...Camejo was a third party candidate for state and national office. He was Nader's running mate in the 2004 presidential election, and attempted three gubernatorial runs in California for the Green Party. In 2002 he garnered 5.3 percent of the vote. In the 2003 recall election, he debated Arnold Schwarzenegger and Gray Davis.