[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/02/28/art.gonzales.gi.jpg caption=" Matt Gonzalez ran for mayor of San Francisco in 2003."](CNN) - Ralph Nader has selected a former San Francisco city official as his running mate in the presidential race.
Nader announced his selection of Matt Gonzalez, who served as a public defender and a member of the board of supervisors in San Francisco, at a news conference Wednesday.
"It is an honor to run with Mr. Nader," Gonzalez said. "I hold him in high esteem and share his politics."
Gonzalez said his priorities in the campaign are election reform, poverty and the war in Iraq.
"I find Matt Gonzalez unwavering in his principles," Nader said.
He announced Sunday that he will launch his fourth consecutive White House bid - fifth if his 1992 write-in campaign is included.
Many Democrats fear Nader could draw votes from whoever gets the party's nomination, potentially helping presumptive Republican nominee Sen. John McCain win the White House in November. Nader has long rejected accusations that he served as a spoiler in 2000, in effect helping George W. Bush beat out Al Gore.