The race for mayor of America's second-largest city is down to the wire and after months of tough campaigning, the three leading candidates are in a virtual dead heat. So with his career on the line, the incumbent, Mayor James Hahn, put everything into his closing swings at the final debate this week: "If you want leadership in this city, I'm your guy!" In the most recent Los Angeles Times poll, Villaraigosa, 52, a former state Assembly speaker and labor organizer who narrowly lost to Hahn four years ago, was the choice of 24 percent. He was followed by Hertzberg,...