Ralph Nader has chosen former San Francisco City Supervisor Matt Gonzalez as a running mate for his 2008 presidential bid. Gonzalez was elected as a San Francisco supervisor in 2000 -- the first Green Party candidate to hold the job. In 2003, Gonzalez narrowly lost a bid for San Francisco mayor to Gavin Newsom, the current SF mayor. Gonzalez, at 42-years-old, provides a relatively youthful infusion to the Nader ticket; Nader turned 74 this week. "I have no illusions," Gonzalez said at a press conference. "I've never entered a contest without some sense the contest can be won."